BIOLOGY Lecture Notes - Lecture 3: Stroke Volume, Coronary Circulation, Systolic Geometry
6 Dec 2022
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Coordinated cycles of heart contraction drive double circulation in mammals. The right ventricle pumps blood to the lungs to start the blood flow. The blood transports o2 and removes co2 from the lungs. The left atrium is where oxygen-rich blood from the lungs enters the heart and is transported to the body"s tissues by the left ventricle via the aorta. The coronary arteries carry blood from the aorta to the heart. The superior and inferior vena cava carry deoxygenated blood from the trunk and hind limbs and the head, neck, and forelimbs, respectively, back to the heart. The right atrium, or ra, receives blood flow from the superior and inferior vena cava. The concept of double circulation is better understood by taking a closer look at the mammalian heart. Right side = deoxygenated blood from body pumped to lungs. The cardiac cycle is the name for the rhythmic cycle in which the heart contracts and relaxes.
