
Draw a sectional view of the human heart and label the aorta, right ventricle, and veins.
Answer
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Hint: The human heart is a muscular organ comprising four chambers. Its shape and size roughly resembles the closed fist of a man. The heart remains enveloped by a pericardial membrane.
Complete answer:
-The human heart is four chambered having two atria and two ventricles. The blood is pumped via ventricular chambers while atrial chambers are responsible for receiving the blood.
-Septum is a wall of muscle separating the right and the left region of the heart. The blood is pumped to the lungs via the right ventricle where pulmonary arteries carry out the re-oxygenation. The backflow of the blood into the heart is prevented by the closing of right semilunar valves. Then the left atrium receives the oxygenated blood from the lungs through the pulmonary veins.
-Heart comprises the blood vessels, namely veins, arteries and the capillaries.
-The deoxygenated blood is supplied to the heart by the veins through inferior and superior vena cava. On the other hand, muscular-walled tubes known as the arteries carry the oxygenated blood from the heart to various other parts of the body. The largest artery is the aorta branching into numerous smaller arteries all through the body. Capillaries are minute, vessels having tube like structure. They are involved in formation of a network among the veins and the arteries.
Note: The heart functions for maintenance of constant blood flow all through the body of an organism. It helps in replenishing oxygen as well as in circulating nutrients in all the cells and tissues of the body.
Complete answer:
-The human heart is four chambered having two atria and two ventricles. The blood is pumped via ventricular chambers while atrial chambers are responsible for receiving the blood.
-Septum is a wall of muscle separating the right and the left region of the heart. The blood is pumped to the lungs via the right ventricle where pulmonary arteries carry out the re-oxygenation. The backflow of the blood into the heart is prevented by the closing of right semilunar valves. Then the left atrium receives the oxygenated blood from the lungs through the pulmonary veins.
-Heart comprises the blood vessels, namely veins, arteries and the capillaries.
-The deoxygenated blood is supplied to the heart by the veins through inferior and superior vena cava. On the other hand, muscular-walled tubes known as the arteries carry the oxygenated blood from the heart to various other parts of the body. The largest artery is the aorta branching into numerous smaller arteries all through the body. Capillaries are minute, vessels having tube like structure. They are involved in formation of a network among the veins and the arteries.

Note: The heart functions for maintenance of constant blood flow all through the body of an organism. It helps in replenishing oxygen as well as in circulating nutrients in all the cells and tissues of the body.
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