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Normal Structure and Function of the Heart

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Normal Structure and Function of the Heart

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Questions and Answers

What is the function of the atrioventricular valves?

Separate the atria and ventricles on each side (correct)

Lubricate the surfaces during cardiac contraction

Regulate blood flow into the pulmonary artery and aorta

Comprise a network of striated muscle cells

What lines the inner wall of the cardiac chambers and the surface of the valve cusps?

Endothelial cells (correct)

Intercalated discs

Striated muscle cells

Mesothelium

What is the composition of the outer layer, the epicardium?

Striated muscle cells

Endothelial cells

Intercalated discs

Mesothelium (correct)

What is the function of venous blood from the systemic circulation?

<p>Drains into the right atrium</p> Signup and view all the answers

What happens when the right ventricle contracts during systole?

<p>It expels blood through the pulmonary valve into the pulmonary artery</p> Signup and view all the answers

Study Notes

Heart Function and Structure

Atrioventricular valves prevent backflow of blood from the ventricles to the atria.
Endocardium, a thin layer of epithelial tissue, lines the inner wall of the cardiac chambers and the surface of the valve cusps.
The epicardium, the outer layer, is composed of connective tissue and anchors the heart to the pericardial sac.
Venous blood from the systemic circulation carries deoxygenated blood back to the heart.
When the right ventricle contracts during systole, it pumps blood from the right ventricle into the pulmonary artery, which then carries oxygen-depleted blood to the lungs.

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Description

Test your knowledge on the normal structure and function of the heart. Learn about the four-chambered muscular pump, atrioventricular valves, arterial valves, and more.