1) How is oxygenated and deoxygenated blood distributed through four chambers? 2
ID: 55869 • Letter: 1
Question
1) How is oxygenated and deoxygenated blood distributed through four chambers?2) What is the structure that blood returns to the heart through and what chamber of the heart does it lead to?
3) Which chamber pumps oxygenated blood to the entire body, what structure does the blood pass through?
4) What is myocardium and which chamber has the thickest layer of myocardium, why?
5) Where is blood coming from when it enters the left atrium?
6)What is the purpose of the bicuspid and tricuspid valves?
7)What is the purpose of the sinoartrial node?
8)What are the papillary muscles?
9) What are purkinje fibers?
10) What would happen if there was a hole in the interatrial septum or inerventricular septum? 1) How is oxygenated and deoxygenated blood distributed through four chambers?
2) What is the structure that blood returns to the heart through and what chamber of the heart does it lead to?
3) Which chamber pumps oxygenated blood to the entire body, what structure does the blood pass through?
4) What is myocardium and which chamber has the thickest layer of myocardium, why?
5) Where is blood coming from when it enters the left atrium?
6)What is the purpose of the bicuspid and tricuspid valves?
7)What is the purpose of the sinoartrial node?
8)What are the papillary muscles?
9) What are purkinje fibers?
10) What would happen if there was a hole in the interatrial septum or inerventricular septum?
2) What is the structure that blood returns to the heart through and what chamber of the heart does it lead to?
3) Which chamber pumps oxygenated blood to the entire body, what structure does the blood pass through?
4) What is myocardium and which chamber has the thickest layer of myocardium, why?
5) Where is blood coming from when it enters the left atrium?
6)What is the purpose of the bicuspid and tricuspid valves?
7)What is the purpose of the sinoartrial node?
8)What are the papillary muscles?
9) What are purkinje fibers?
10) What would happen if there was a hole in the interatrial septum or inerventricular septum?
Explanation / Answer
Answer:
Deoxygenated blood is carried from the body parts by the Inferior and Superior Vena Cava veins into the Right Atrium of the heart. The Right Atrium pumps the deoxygenated blood into the Right Ventricle from which the blood is transferred to the lungs via the Pulmonary Artery. The blood will be purified and get oxygenated in the lungs. The oxygenated (from the lungs) blood returns to the heart via the Pulmonary Veins, and is pumped into the Left Atrium. Then, the blood is pumped into the Left Ventricle, and ultimately is sent to the body parts via a blood vessel called the Aorta.
2. What is the structure that blood returns to the heart through and what chamber of the heart does it lead to?
Answer:
Veins are the blood vessels (Inferior and Superior Vena Cava veins) that carry deoxygenated blood from the body parts to the right atrium and one pulmonary vein carry oxygenated blood to left atrium from lungs.
3. Which chamber pumps oxygenated blood to the entire body, what structure does the blood pass through?
Answe:
Generally all arteries carry the blood to the body parts. The oxygenated blood from left ventricle will be pumped to the entire body through aorta.
4. What is myocardium and which chamber has the thickest layer of myocardium, why?
Answer:
The heart is composed of three layers i.e., the epicardium (outer) the myocardium (middle) and endocardium (inner layer). The myocardium is the muscular layer and the thickest layer of the heart wall.
Generally ventricles have thicker layer of myocardium. The reasons are as follows….
The right ventricle must pump all blood returning to the heart into the lungs for oxygenation.
The left ventricle, as the left ventricle must create a lot of pressure to pump blood to all parts of the body through aorta.
5. Where is blood coming from when it enters the left atrium?
Answer:
The blood (deoxygenated) comes from all body parts through inferior and superior vena cava to right atrium. Right atrium pumps the blood to right ventricle and then to lungs. The blood will be oxygenated in the lungs and sent to left atrium through pulmonary vein.
6. What is the purpose of the bicuspid and tricuspid valves?
Answer:
The right atrium pumps the deoxygenated blood 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.
Blood moves from the left atrium to the left ventricle via the bicuspid valve (mitral valve), which prevent the back flow of blood.
7. What is the purpose of the sinoartrial node?
Answer:
Sinoatrial node is called as pacemaker of the heart. It can cause the heart to contract by generating electrical impulses and then pump blood throughout the body.
8. What are the papillary muscles?
Answer:
Papillary muscles are muscles located in the ventricles of the heart. They attach to the atrioventricular valves (both the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole.
9. What are purkinje fibers?
Answer:
Purkinje fibers are specialized cardiac muscle fibers, which helps in conducting impulses of the heart that rapidly transmit impulses from the atrioventricular node to the ventricles.
10) What would happen if there was a hole in the interatrial septum or inerventricular septum?
Answer:
Inter atrial septum is present between two atria chambers. When a hole happened to the septum, the oxygenated blood moves from left atrium to right atrium instead of pumping to the left ventricle. If the blood doesn’t move to left ventricle and cann’t be pumped to body parts.
Inter ventricular septum is present between two ventricles. In the same way, the opening between the ventricles leads to leakage of the oxygen-rich blood from the left ventricle into the right ventricle instead of flowing forward to the body, which leads to inefficient blood flow throughout the body parts.
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