Lab 3 Ch. 7

Lab 3 Ch. 7 - Circulatory System HEART STRUCTURE Four...

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Circulatory System HEART STRUCTURE Four chambers: a. 2 ATRIA - right and left atrium, which receive venous blood b. 2 VENTRICLES - right and left ventricle, which eject blood into aorta and pulmonary artery Note: one side of heart contains deoxygenated blood
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Heart valves Heart valves 1. The atrioventricular (AV) valves – located between the atria and the ventricles tricuspid valve – between RA and RV bicuspid valve (mitral) – between LA and LV 2. The semilunar valves aortic s.v. – between the aorta and the LV pulmonary s.v. – between the pulmonary artery and RV
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Note: the heart shown is of someone facing you
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Heart Wall Parietal pericardium – pericardial sac that surrounds the heart Epicardium or visceral pericardium - outer layer Myocardium - cardiac muscle tissue Endocardium - inner layer continuous with the endothelium of blood vessels
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Pulmonary circulation : R ventricle → lungs → L atrium Pulmonary arteries carry deoxygenated blood to the lungs, while p. veins carry
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Lab 3 Ch. 7 - Circulatory System HEART STRUCTURE Four...

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