SLP4: Anatomy of cardiorespiratory system 2025

The left atrium receives oxygenated blood.​

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The heart is covered with double-layered sac, the pleura.​

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The endocardium​ is the innermost layer of the heart wall.

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The epicardium is also called the visceral pericardium. ​

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• FALSE

The coronary sinus (vein) drains blood into the left atrium.​

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• FALSE

The tricuspid valve prevents the backward flow of blood from the left atrium into the left ventricle.

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The atrioventricular valves open when the ventricles contract.

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The myocardium is composed of cardiac muscle tissue.​

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The wall of the left ventricle is thicker than that of the right ventricle.​

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• FALSE

The chordae tendineae are attached to the semilunar valve.​

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• FALSE