This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the answers to your next biology questions: 21. Draw and label circulatory systems in mammals. I cannot draw, but I can describe the mammalian circulatory system. It is a closed, double circulatory system. Closed: Blood is always contained within a network of blood vessels (arteries, veins, capillaries) and does not directly bathe the tissues. Double: Blood passes through the heart twice for each complete circuit of the body. Pulmonary Circulation:* Carries deoxygenated blood from the heart to the lungs for oxygenation and returns oxygenated blood to the heart. Systemic Circulation:* Carries oxygenated blood from the heart to all other body parts and returns deoxygenated blood to the heart. The main components are the heart (a four-chambered pump), blood vessels (arteries, veins, capillaries), and blood (the transport medium). 22. Draw and label the internal structure of the mammalian heart. I cannot draw, but I can describe the internal structure of the mammalian heart: Four Chambers: Right Atrium:* Receives deoxygenated blood from the body via the superior and inferior vena cava. Right Ventricle:* Pumps deoxygenated blood to the lungs via the pulmonary artery. Left Atrium:* Receives oxygenated blood from the lungs via the pulmonary veins. Left Ventricle:* Pumps oxygenated blood to the rest of the body via the aorta. Valves: These prevent backflow of blood. Tricuspid Valve:* Between the right atrium and right ventricle. Pulmonary Valve:* Between the right ventricle and the pulmonary artery. Mitral (Bicuspid) Valve:* Between the left atrium and left ventricle. Aortic Valve:* Between the left ventricle and the aorta. Septum: A muscular wall that divides the heart into right and left sides, preventing the mixing of oxygenated and deoxygenated blood. It includes the interatrial septum and interventricular septum*. Major Blood Vessels: The vena cavae (superior and inferior), pulmonary artery, pulmonary veins, and aorta* are directly connected to the heart chambers. That's 22 down. 20 left today — send the next one.