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structure of heart
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Key Points
The heart is divided into four chambers consisting of two atria and two ventricles; the atria receive blood, while the ventricles pump blood.The right atrium receives blood from the superior and inferior vena cavas and the coronary sinus; blood then moves to the right ventricle where it is pumped to the lungs.The lungs re-oxygenate the blood and send it to the left atrium.Blood moves from the left atrium to the left ventricle via the bicuspid valve; blood is pumped out of the left ventricle to the aorta, which sends blood to the organs and muscles of the body.The heart is composed of three layers: the epicardium (outer layer), the myocardium (middle layer), and the endocardium (inner layer).
Key Terms
aorta: the largest artery in the human body which carries the blood from the heart to all parts of the body except the lungsinferior vena cava: large vein that carries deoxygenated blood from the lower half of the body to the right atrium of the heartsuperior vena cava: large vein that carries deoxygenated blood from the upper half of the body to the right atrium of the
Key Points
The heart is divided into four chambers consisting of two atria and two ventricles; the atria receive blood, while the ventricles pump blood.The right atrium receives blood from the superior and inferior vena cavas and the coronary sinus; blood then moves to the right ventricle where it is pumped to the lungs.The lungs re-oxygenate the blood and send it to the left atrium.Blood moves from the left atrium to the left ventricle via the bicuspid valve; blood is pumped out of the left ventricle to the aorta, which sends blood to the organs and muscles of the body.The heart is composed of three layers: the epicardium (outer layer), the myocardium (middle layer), and the endocardium (inner layer).
Key Terms
aorta: the largest artery in the human body which carries the blood from the heart to all parts of the body except the lungsinferior vena cava: large vein that carries deoxygenated blood from the lower half of the body to the right atrium of the heartsuperior vena cava: large vein that carries deoxygenated blood from the upper half of the body to the right atrium of the
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