draw a block diagram to explain single and double circulation
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In a single circulatory system, for example in a fish, oxygenated blood moves from the gill capillaries to the systemic capillaries, then to the heart. The heart is divided into two chambers and does not contain a left or right side.
In a double circulatory system, for example in a mammal, oxygenated blood moves from the lung capillaries to the left side of the heart and then to the systemic capillaries. Deoxygenated blood moves from the systemic capillaries to the right side of the heart and then to the lung capillaries. The heart is divided into left and right halves by a muscular septum and contains four chambers.
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biology 10th class 3rd lesson transportation lesson 20th question
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