ANIMAL PHYSIOLOGY
HUMAN CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Vena Cava
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Aorta
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Pulmonary artery
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Pulmonary vein
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Detailed explanation-1: -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 the heart.
Detailed explanation-2: -Both the superior vena cava and inferior vena cava empty blood into the right atrium. Blood flows through the tricuspid valve into the right ventricle. It then flows through the pulmonic valve into the pulmonary artery before being delivered to the lungs.
Detailed explanation-3: -Vena cava-One of the two great veins that carries deoxygenated blood from the body to the right atrium of the heart.
Detailed explanation-4: -Deoxygenated blood from the body enters the right atrium thru the superior vena cava and inferior vena cava. The tricuspid valve opens to allow blood to flow out of the right atrium to the right ventricle. When the right ventricle is filled it squeezes, which closes the tricuspid valve and opens the pulmonary valve.