Heart and Pulmonary Circulation: Anatomy,
Function, and Fetal Blood Flow Questions and
Correct Answers | Latest Update
What is the primary function of the cardiovascular system?
Ans: To deliver oxygen and nutrients to cells while removing carbon
dioxide and wastes.
What are the two circuits of body circulation?
Ans: The pulmonary circuit and the systemic circuit.
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Describe the flow of blood in the pulmonary circuit.
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Ans: Heart → pulmonary arteries → lungs → pulmonary veins → heart.
Describe the flow of blood in the systemic circuit.
Ans: Heart → aorta → organs of the body through systemic arteries →
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systemic veins → heart.
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What powers the pulmonary circulation?
Ans: The right side of the heart.
What powers the systemic circulation?
Ans: The left side of the heart.
Where is the heart located?
Ans: In the thoracic cavity, medially between the lungs in the
mediastinum.
What separates the heart from other structures?
Ans: The pericardium, or pericardial sac.
What is the size of the heart relative to the human body?
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Ans: The size of a fist.
What are the three layers of the heart wall?
Ans: Epicardium, myocardium, and endocardium.
What is the function of the myocardium?
Ans: It is the layer of cardiac muscle that contracts to pump blood.
What is the fibrous skeleton of the heart?
Ans: A framework of collagenous and elastic fibers providing structural
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support and electrical insulation.
What are the four chambers of the heart?
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Ans: Right atrium, left atrium, right ventricle, left ventricle.
What separates the right and left atria?
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Ans: The interatrial septum.
What separates the right and left ventricles?
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Ans: The interventricular septum.
What are the internal ridges in the ventricles called?
Ans: Trabeculae carneae.
What is the pathway of deoxygenated blood entering the heart?
Ans: Superior and inferior vena cavas → right atrium → right ventricle
→ pulmonary arteries.
What is the pathway of oxygenated blood exiting the heart?
Ans: Left ventricle → aorta.
What are the four valves of the heart?