HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The heartrate can be doubled to pump more blood around the body when exercising.
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There are two ‘dubs’ (dub-dub) in one heart beat.
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The blood moves through the heart twice to be pressurized twice.
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Becasue there are two different kinds of blood vessels that are attached to the heart (arteries and veins).
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Detailed explanation-1: -The deoxygenated blood comes to the heart and goes to the lungs for oxygenation. Simultaneously, the oxygenated blood comes to the heart from lungs and goes to different organs. Due to this. blood circulation in human heart is called double circulation.
Detailed explanation-2: -Double circulation supports a strict separation of both oxygenated and deoxygenated blood. Therefore, this circulation ensures that the body always has a dedicated supply of oxygen and also, it improves body efficiency.
Detailed explanation-3: -Double circulation describes the fact that blood flows twice in the heart before it completes one full round. One is pulmonary circulation and the other is systemic circulation. Pulmonary circulation starts from the pulmonary artery which divides into two branches which enter the respective lungs.