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What prevents mixing of oxygenated and deoxygenated blood inside the heart

To avoid the mixing of oxygenated and deoxygenated blood

  1. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the oxygen-rich blood to the body. The one-way valves present in the heart prevents the backflow of blood, so, O
  2. Septum - completely separates the into the left and right sides to prevent the mixing of oxygenated and deoxygenated blood. The heart has four chambers two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs
  3. The structure that prevents the mixture of oxygenated blood and deoxygenated blood inside the heart is called the septum. The right ventricle receives the deoxygenated blood from the body and pumps it to the lungs. The left ventricle receives oxygenated blood from the lungs and pumps it to the body

The heart has four chambers - left atrium, left ventricle, right atrium & right ventricle. The left chamber holds oxygenated blood while the right chamber holds deoxygenated blood. The two sides. Which part of the heart prevents the mixing of oxygenated from deoxygenated blood? The left ventricle pumps the oxygen-rich blood to the body. The one-way valves present in the heart prevents the backflow of blood, so, O2 rich and CO2 rich blood can not be mixed There is no blending of deoxygenated blood and oxygenated blood in the human heart regularly in light of the fact that: The human heart has four chambers with two separate chambers for each oxygenated and deoxygenated blood. With a specific end goal to build the productivity of oxygen carrier, a blending of blood is anticipated Well, if oxygenated and deoxygenated bloods get mixed, it will reduce the overall efficiency of blood to carry oxygen to the tissues. How it does so is interesting

Mam Phys Exam 2 Flashcards - Cram

Which structure in heart prevents the mixing of oxygenated

  1. coronary veins carry deoxygenated blood from the heart tissue into the right atrium. atherosclerosis is a disease in which plaque builds up inside your arteries. This hardens the Narrows your arteries to limit the flow of blood to your body tissues. separate the two atria, prevents the mixing of oxygenated and deoxygenated blood
  2. For those who have knowledge about the structure of our heart, know that our heart is 4 chambered. It provides us with an efficient system to oxygenate our blood, maintain adequate pressure, and prevent mixing of oxygenated and deoxygenated blood. Did you know that not all animals have this luxury
  3. There is no mixing of deoxygenated and oxygenated blood in human heart due to the presence of inter-atrial and inter-ventricular septum. These septa completely divide the atria and ventricles into right and left to avoid mixing of blood. The backflow of the blood is prevented by the presence of valves
  4. g from the two atria. Contraction of the ventricle sends oxygenated blood..
  5. In four chambered heart, left half is completely separated from right half by septa. This prevents oxygenated and deoxygenated blood from mixing. This allows a highly efficient supply of oxygenated blood to all parts of the body. This is useful in animals that have high energy needs, such as birds and mammals. Question 41

Blood without oxygen coming back to the heart from other areas of the body enters into the right side of the heart and goes into the lungs. Blood that has been oxygenated by the lungs enters into the left side of the heart and is pumped back out into the body The heart is a unidirectional pump. Valves are present to prevent the backflow of blood. The right side pumps deoxygenated blood (low in oxygen and high in carbon dioxide) to the lungs. The left.. When a heart is properly divided, the oxygen-rich blood from the lungs does not mix with the oxygen-poor blood from the body. A CAVC allows blood to mix and the chambers and valves to not properly route the blood to each station of circulation. More information about Complete Atrioventricular Canal defect (CAVC) The heart is the muscular pump that pumps oxygenated blood to the metabolizing tissues while the deoxygenated blood returns to the heart through veins. On that account, oxygenated blood and deoxygenated blood are the two types of blood circulated throughout the body

4 The structure that prevents the mixture of oxygenated

  1. This hole lets oxygenated and deoxygenated blood mix. In a child with this condition, the heart has to work much harder than normal, and may enlarge. Symptoms include breathlessness, difficulty feeding, increased heart rate and failure to grow at the expected rate
  2. A semilunar valve between the right ventricle and pulmonary artery - it prevents blood from flowing back into the heart from the artery
  3. Basically, the heart valves and the forward flow pressures prevent the backflow of blood within the heart during contractions. During systole, when the ventricles contract, the pressure built up in the right ventricle opens the semilunar, pulmonic..
  4. Because there is only a single ventricle there is some mixing of oxygenated and deoxygenated blood. Ventricular folds prevent a complete mixing of the arterial and venous blood. Excitation of the frog heart heart is myogenic, that is, contraction of the heart originates within the muscle itself
  5. The septum is very important - it prevents the mixing of deoxygenated and oxygenated blood inside the heart; If blood were to mix, then less oxygenated blood would be pumped around the body; The heart is made of a special type of cardiac muscle tissue which does not fatigue like skeletal muscl
  6. What happens when oxygenated and deoxygenated blood in the heart become mixed? Before you are born, you have a hole in your heart to bypass some of the lung circulation (not all). Most of the time, this hole (Foramen Ovale) closes after birth and lung expansion
  7. Mixing lesion • Oxygenated and Deoxygenated blood - Associated shunt • Allows oxygenated blood to enter systemic circulation . Pulmonary veins meet in a separate chamber behind the heart instead of dumping into the LA. Draining vein takes this blood down through the diaphragm into the systemic venous system and back to right sid

Inside the fetal heart: Blood enters the right atrium, the chamber on the upper right side of the heart. When the blood enters the right atrium, most of it flows through the foramen ovale into the left atrium. Blood then passes into the left ventricle (lower chamber of the heart) and then to the aorta, (the large artery coming from the heart. (a)Double circulation is important to keep the oxygenated and deoxygenated blood separate from each other in the body and prevent their mixing. Such separation allows a highly efficient supply of oxygen to the body Depending on the constellation of abnormalities, congenital heart disease is often categorized as either cyanotic (causing a bluish skin colour) or noncyanotic. Cyanosis occurs when a mixture of oxygenated and deoxygenated blood courses through the arteries, bringing on the blue-red-violet hue characteristic of deoxygenated blood in the veins.. Some congenital cardiac defects are associated.

What structure in the heart prevents mixing of oxygenated

  1. The pulmonary artery arises from the right ventricle and tranports deoxygenated blood (oxygen-poor) to the lungs, where the blood becomes oxygenated again. The four pulmonary veins return the oxygenated blood (oxygen-rich) to the left atrium of the heart. The pulmonary circulation is also referred to as the lesser circulation
  2. The heart has two separate compartments (four chambers) in order to prevent the mixing of oxygenated and deoxygenated blood. The right side of the heart pumps deoxygenated blood and is called the pulmonary circulation. Therefore, in pulmonary circulation, deoxygenated blood flows from the right ventricle to the lungs and oxygenated blood.
  3. The aortic valve is the final valve that oxygen-rich blood passes through before exiting the heart and coursing through the rest of the body. The valve prevents blood from flowing back to the left.
  4. The SEPTUM separates the right side of the heart from the left side. This is to prevent the mixing of oxygenated blood with deoxygenated blood
  5. The heart is separated by a partition called septum (from right side of the heart to the left side). This prevents mixing of oxygenated and deoxygenated blood inside the heart. Left and Right Side of the Heart The left and right side of the heart act as two separate pumps. The left side of heart pumps the oxygenated blood into the whole body.

Trace the pathway of oxygenated and deoxygenated blood thorough the chambers of the heart The vital importance of the heart is obvious. If one assumes an average rate of contraction of 75 contractions per minute, a human heart would contract approximately 108,000 times in one day, more than 39 million times in one year, and nearly 3 billion. After blood circulation, deoxygenated blood, instead of going to the lungs for oxygen, enters the left ventricle through the hole. In the left ventricle, it mixes with oxygen-rich blood. Therefore, the supply of oxygenated blood to the body is reduced, leading to the weakening of the heart

A ventricular septal defect can allow newly oxygenated blood to flow from the left ventricle, where the pressures are higher, to the right ventricle, where the pressures are lower, and mix with. Carotid arteries: Supply oxygenated blood to the head and neck regions of the body. Common iliac arteries: Carry oxygenated blood from the abdominal aorta to the legs and feet. Coronary arteries: Carry oxygenated and nutrient-filled blood to the heart muscle. Pulmonary artery: Carries deoxygenated blood from the right ventricle to the lungs

The top chambers of the heart, The side of the heart that handles oxygenated blood, Deoxygenated blood is pumped from the right ventricle through pulmonary arteries to this location, A structure that prevents the mixing of oxygenated and deoxygenated blood in the heart Humans have a four-chambered heart consisting of the right atrium, left atrium, right ventricle, and left ventricle. The atria are the two upper chambers. The right atrium receives and holds deoxygenated blood from the superior vena cava, inferior vena cava, anterior cardiac veins and smallest cardiac veins and the coronary sinus, which it then sends down to the right ventricle (through the. Mixing of oxygenated blood with deoxygenated blood will lead to less oxygen supply to the cells. Under oxygen deficient condition, cells will not perform normally which may adversely affect the organism as a whole. Question 5. Does artery always carries oxygen-rich blood? Answer: No. Pulmonary artery carries carbon dioxide-rich blood from heart. That way it prevents oxygen-rich blood from mixing up with the one without oxygen. So, the heart functions go smoothly. Deoxygenated blood enters the right atrium. The valve present between the right atrium and the right ventricle is the tricuspid valve. It opens to let the blood flow into the right ventricle The oxygen rich blood that enters the fetus passes through the fetal liver and enters the right side of the heart. The oxygen rich blood goes through one of the two extra connections in the fetal heart that will close after the baby is born. The hole between the top two heart chambers (right and left atrium) is called a patent foramen ovale.

The interior of the heart helps maintain the life-sustaining flow of blood. A wall of tissue, known as the septum divides the heart into two halves—this prevents oxygen-rich blood and oxygen-depleted blood from mixing. Interatrial septum: The interatrial septum separates the left atria and the right atria Four chambered heart in birds and mammals exhibit double circulation of blood. Double circulation system prevents mixing of oxygenated and deoxygenated blood with each other. Birds and mammals are worm blooded. This worm body temperature helps to carry out body processes more efficiently. Maintaining the constant temperature inside the body. Different human circulatory systems Mechanism Closed system Blood surges through the body in a closed network of vessels No blood escapes into tissues or mixes with the tissue fluid Double circulation Double circulatory system Both systems connected at the heart Circulation divided into oxygenated blood and deoxygenated blood system Further. The aorta carries oxygen-rich blood away from the heart, to the rest of the body. Arteries to Head and Arms. Lower chamber of the heart that pumps deoxygenated blood into the lungs. The right ventricle has thinner walls than the left ventricle. 3-leafed valve that prevents blood from flowing backwards from the aorta into the left. It is composed of four chambers (2 atria & 2 ventricles) to prevent the mixing of oxygenated & deoxygenated blood. Ventricles are thick wailed as they have to pump the blood to various organs of the body. In addition, valves are also present in heart and veins to prevent the backflow of the blood

Why does the heart separate the oxygenated and

Why there is no mixing of deoxygenated blood and

Reptiles can mix oxygenated and deoxygenated blood since they have 3 chambers. In one chamber, deoxygenated blood enters. Let's say that one is on the right. On the left, oxygenated blood enters. So blood goes through the right side and into the middle, then pumps into the lungs. But when it comes from the lungs it goes back into that middle. This allows blood that is relatively low in oxygen from the right ventricle to flow into the left ventricle and mix with the blood that is relatively high in oxygen. Symptoms include a distinct heart murmur, low blood oxygen percent saturation, dyspnea or difficulty in breathing, polycythemia, broadening (clubbing) of the fingers and toes, and. All arteries carry oxygenated blood, except pulmonary arteries, which carry deoxygenated blood from the right ventricle to the lungs. All veins carry deoxygenated blood, except pulmonary veins, which carry oxygenated blood from the lungs and to the left atrium of the Heart. Question 5. Transpiration is a necessary evil in plants. Explain. Answer

Question 5 (2 points) Which is characteristic of all mammals, and only of mammals O using the rib cage to assist in ventilating the lungs a four-chambered heart that prevents mixing of oxygenated and deoxygenated blood having glands to produce nourishing milk for offspring O parental care of offspring O giving birth to live young (viviparous) Question 4 (2 points) Which of the following is a. The three congenital heart defects can be classified into three categories as follows: 1) Defects producing mixing of oxygenated and unoxygenated blood: The right chamber of the heart is involved in receiving and pumping the deoxygenated blood.The left side of the heart is involved in receiving and pumping the oxygenated blood

User: Frog hearts have a chamber where deoxygenated blood can mix with oxygenated blood.What structure would help prevent this mixing? atria pericardium septum blood vessels Weegy: Frog hearts have a chamber where deoxygenated blood can mix with oxygenated blood.SEPTUM structure would help prevent this mixing The heart is a hollow muscular organ which beats over 100,000 times a day to pump blood around the body's 60,000 miles of blood vessels. The right side of the heart receives blood and sends it to the lungs to be oxygenated, while the left side receives oxygenated blood from the lungs and sends it out to the tissues of the body

Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated and this oxygenated blood is brought back to the heart via pulmonary veins towards the left atrium. 18.2 The given graph indicates the average rate of blood flow in the different blood vessels

Frog hearts have a chamber where deoxygenated blood can mix with oxygenated blood. What structure would help prevent this mixing? was asked on Nov 06 2017. View the answer now A rteries carry oxygenated blood a way from the heart (except for the pulmonary artery which carries deoxygenated blood away from the right ventricle to the lungs). The main a rtery is the a orta. In this arrangement, the left side of the heart receives and pumps only oxygen-rich blood, while the right side handles only oxygen-poor blood. Double circulation restores pressure to the systemic circuit after blood has passed through the lung capillaries and prevents mixing of oxygen-rich and oxygen-poor blood

What would happen if oxygenagted blood and deoxygenated

Blood lab Flashcards - Questions and Answers Quizle

Oxygen-laden blood and oxygen-poor blood containing waste gases are present together in the frog ventricle at all times. The oxygen-laden and oxygen-poor bloods, however, do not mix. Such mixing is prevented by a unique arrangement of the frog's heart. Instead of perching on top of the ventricle, the right atrium dips downward into the ventricle The mixing of these two types of blood is prevented by a septum that divides the heart into two chambers: one for the oxygenated blood and the other for the deoxygenated blood. Pericardium is a layer of covering on the heart that prevents friction build-up during cardiac activity Enlargement of the heart. Increased blood flow through the heart forces it to work harder than normal, causing it to enlarge. Pulmonary hypertension. When there is a hole (defect) that allows mixing of oxygenated (red) and deoxygenated (blue) blood, the amount of blood that goes to the lungs is increased

Oxygenated blood leaves the lungs and returns to the heart through the PULMONARY VEINS and enters the LEFT ATRIUM Now that it's oxygenated, it's ready to go and get pumped back to the body! 7 Systemic Circuit - in which oxygenated blood is pumped from the left side of heart to the body tissues. The blood offloads Oxygen as nutrient for the tissues and loads the waste product, Carbon dioxide. This deoxygenated blood then flows from the body tissues back to the right side of the heart. This flow of blood from the heart to the body. The heart is a complex organ, using four chambers, four valves, and multiple blood vessels to provide blood to the body. Blood flow itself is equally complex, involving a cyclic series of steps that move blood trough the heart and to the lungs to be oxygenated, deliver it throughout the body, then bring blood back to the heart to re-start the. Double circulation also helps keep the oxygenated and deoxygenated blood separate and prevents their mixing - this allows a highly efficient supply of oxygen to the body. Name and identify the structures of the mammalian heart, limited to the muscular wall, the septum, the left and right ventricles and atria, one-way valves and coronary arterie Pathway of Blood Through the Heart. In this educational lesson, we learn about the blood flow order through the human heart in 14 easy steps, from the superior and inferior vena cava to the atria and ventricles. Come also learn with us the heart's anatomy, including where deoxygenated and oxygenated blood flow, in the superior vena cava, inferior vena cava, atrium, ventricle, aorta.

Two & Three Chambered Hearts: How Do They Work? » Science AB

The blood which carries oxygen is called oxygenated blood and the blood which does not carry oxygen is called deoxygenated blood, however carries carbon dioxide in it These two sides are divided by a wall called septum. The function of the septum is to prevent intermixing of the deoxygenated and the oxygenated blood. A hole in the heart occurs when there is an opening in this septum which allows the oxygenated and the deoxygenated blood to mix and some part of the oxygenated blood gets pumped into the lungs This happens on the right side of the heart and takes blood from the body to the heart and then from the heart to the lungs to pick up oxygen and get rid of carbon dioxide (a waste product). • Deoxygenated blood returns from the body (where it has used up oxygen) to the heart. It enters th - Longitudinal septum which separates the heart into two halves to prevent mixing of oxygenated and deoxygenated blood; - Valves to prevent back flow of blood; - Valves have strands of connecting tissue (chordas tendinae) to prevent them from being pushe In V‐A ECMO, the oxygenated blood from the membrane oxygenator mixes in the aorta with the venous blood which has passed through the native heart and lungs and the mixture of the two determines the composition of oxygen and CO 2 in the resultant systemic circulation. Typically, the blood from the membrane oxygenator has an oxygen content of.

Assertion : There is no mixing of oxygenated and

The 4 chambered heart differs from the 3 chambered heart in that it keeps oxygenated blood completely separate from de-oxygnated blood, because there is one ventricle for deoxgynated blood and one for oxygenated blood. In the 3 chambered heart, a single ventricle pumps both out of the heart, and there is some mixing between fresh and old blood. This valve maintains the unidirectional flow of blood in the heart and prevents the back flow of blood. In the middle of ventricle some mixing of oxygenated and deoxygenated blood takes place. On the two sides the blood remains unmixed due to rapid flow of blood. When ventricle contracts the blood goes to the truncus arteriosus through an aperture Normally, the right side of the heart pumps blood to the lungs to get oxygen; the left side pumps the oxygen-rich blood to the rest of the body. A VSD allows oxygenated blood to mix with deoxygenated blood, causing increased blood pressure and increased blood flow in the lung arteries. This results in increased work for the heart and lungs (a) Structure/ part that divides the heart into right and left halves and prevents mixing of oxygenated and deoxygenated blood (b) Part which prevents backflow of blood (c) Chamber that receives deoxygenated blood from various parts of the body (d) Chamber from where oxygenated blood is pumped out to various parts of the body. (CCE 2012) Answer

How does circulation of blood in 3 chambered heart work

Oxygenated blood then comes from the lungs and the skin, and enters the left atrium. (This also serves as a gas exchange in most amphibians.) Both atria dump their blood into the single ventricle. The ventricle is divided into two narrowly separated chambers, which cleverly reduces the mixing of oxygenated and deoxygenated blood together Deoxygenated blood from the cardiac muscles, drains into the right atrium by the coronary sinuses. In human, the blood circulates twice, through the heart in one complete cycle, called double circulation. The oxygenated blood does not mix with the deoxygenated blood. Question 2 Blood continuously moves through the body. It is important to remember that the left side pumps oxygenated blood from the lungs to the body, and the right side pumps oxygen-poor blood to the lungs from the body. The septum vertically divides the left and the right sides of the heart and prevents mixing of oxygen-rich blood and deoxygenated blood Tendinous Cords: stop valves from being turned inside out. Septum: wall between the two chambers of the heart which stops oxygenated and deoxygenated blood mixing. Cardiac Muscle: the muscle that the heart is made of, which beats rhythmically and does not fatigue like other muscle. It is myogenic (self stimulating) This septum prevents the mixing of oxygenated blood on the left side with the deoxygenated blood on its right side. Question 9: Name the organ which is located in the chest cavity with its lower tip slightly tilted towards the left. Answer: The heart is the organ located in the chest cavity with its lower tip slightly tilted towards the left

oxygenated blood. In the 3 chambered heart, a single ventricle pumps both out of the heart, and there is some mixing between fresh and old blood. The 2 ventricle-4 chamber heart prevents mixing allows the blood leaving the heart to have far more oxygen than it would otherwise. This is good for enhancing the more fas Only oxygenated blood is contained in the left side of ventricle received from left auricle, with some mixed blood in the middle region. The mixing of two types of blood was prevented because of their viscous nature and also because of the spongy nature of ventricle. The ventricle is spongy because of the presence of network of columnae carneae

Life Processes Class 10 Extra Questions with Answers

To combat this blood flow problem, veins contain many one-way valves, which permit blood to flow only toward the heart. Muscular contractions within the feet and legs exert pressure on the veins to push blood through the valves and toward the heart. When the muscles relax, the valves prevent the blood from moving away from the heart The heart is an amazing organ. It starts beating about 22 days after conception and continuously pumps oxygenated red blood cells and nutrient-rich blood and other compounds like platelets throughout your body to sustain the life of your organs.; Its pumping power also pushes blood through organs like the lungs to remove waste products like CO2.; This fist-sized powerhouse beats (expands and. The oxygen rich blood travels through the lungs to the atrium and oxygen poor blood is taken from the tissues back to the atrium..But there is no mixing of oxygen rich and oxygen poor blood; Respiratory system. Diffusion happens if oxygen is present but the external gills help increase oxygen when there is less oxygen. Digestive syste On the surface of the heart, the ventricles are separated from atria by an atrioventricular groove, and the ventricles are separated from each other by inter-ventricular grooves. Chambers of Heart. The human heart is a four-chambered organ where there is complete separation of oxygenated and deoxygenated blood. It has two atria and two ventricles

How is oxygenated and deoxygenated blood kept from mixing

But most of this highly oxygenated blood flows to a large vessel called the inferior vena cava and then into the right atrium of the heart. Here is what happens inside the fetal heart: When oxygenated blood from the mother enters the right side of the heart, it flows into the upper chamber (the right atrium) The frog heart has 3 chambers: two atria and a single ventricle. The atrium receives deoxygenated blood from the blood vessels (veins) that drain the various organs of the body. The left atrium receives oxygenated blood from the lungs and skin (which also serves as a gas exchange organ in most amphibians). Both atria empty into the single. 14. In the ventricles, deoxygenated blood is prevented from mixing with oxygenated blood by the structure labeled 15. Which sequence correctly represents the flow of blood through the heart? C) 1-+2 and 3+4 D) 1+2 and 4-+3 16. Oxygenated blood from the left lung is returned to the heart through a structure labeled 18

As blood travels through the body, oxygen is used up, and the blood becomes oxygen poor. Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of. This allows a mixing of oxygenated blood (from the left heart) and deoxygenated blood (from the right side of the heart) in the right atrium and right ventricle This prevents mixing of oxygenated and deoxygenated blood and provides efficient supply of oxygen. This is necessary because they need more energy to maintain their body temperature. ii) The heart in amphibians and reptiles :- have three chambers and allows some mixing of oxygenated and deoxygenated blood because the do not use energy to. In addition, the right atrium receives blood from the coronary sinus, which drains deoxygenated blood from the heart itself. This deoxygenated blood then passes to the right ventricle through the right atrioventricular valve (tricuspid valve), a flap of connective tissue that opens in only one direction to prevent the backflow of blood The oxygen rich water flows in a countercurrent pattern to the blood and allows efficient oxygen and carbon dioxide exchange to take place. Dogfish Heart and Aortic Arches To expose the blood vessels, first skin the roof of the mouth where the efferent (e=from) branchial arteries are located

so what you're looking at is basically a kind of a mechanistic way of thinking about the heart almost as if it's a couple of pumps with pipes attached to the pumps and in a way that's that's not a bad way to think about the heart in fact we're going to kind of move through this diagram and I realize it looks a little bit scary but once I start labeling stuff you'll start seeing that it's. 3)The de-oxygenated blood from various parts of the body is poured into right atrium through large veins called vena cava.. 4)As the right atrium contracts,the corresponding right ventricle expands and blood through tricuspid valve gets collected.It then pumps it to the lungs for oxygenation by pulmonary arteries.In the lungs this blood become oxygenated and return to the heart by pulmonary veins Right atrium receives deoxygenated blood from superior and inferior venae cavae and coronary sinus •Fossa ovalis—remnant of fetal foramen ovale that allowed fetal blood to pass between atria; closes at birth Left atrium receives oxygenated blood from pulmonary veins Pectinate muscles—muscular ridges located inside The circulatory loop that carries deoxygenated blood to the lungs and returns oxygenated blood to the heart is the _____ circulation. A. systemic. B. pulmonary. C. renal. D. hepatic. The duodenum and ileum are parts of a frog's _____. A. brain. B. small intestine. C. large intestine. D. excretory system. Which of the fol

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