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Questions and Answers
What is the function of the atrioventricular valves?
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?
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?
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?
What is the function of venous blood from the systemic circulation?
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What happens when the right ventricle contracts during systole?
What happens when the right ventricle contracts during systole?
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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.
