Biology-10th Life Processes CBSE Board 2023 Medium
Besides heart, the human circulatory system consists of a network of closed branching blood vessels and the b…
Besides heart, the human circulatory system consists of a network of closed branching blood vessels and the blood that circulates continuously in all parts of the human body. The human heart is a muscular organ which is as big as our fist. It has four chambers — two upper chambers called atria and two lower chambers called ventricles. The right side of the human heart is separated from the left side by a dividing wall, which is known as septum.
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