In many vertebrates, including humans, blood flows in two circuits; in an arrangement called double circulation. Which of the following is not an advantage of double circulation over the single circulation organization found in fish? Options: A . &nbspOxygenated and deoxygenated blood are present in separate compartments and prevent mixing of blood. B . &nbspOxygenated blood can be mixed with deoxygenated blood before passing through the tissues of the body. C . &nbspThe blood flows to the body tissues under higher pressure and faster, allowing for more efficient delivery of oxygen. D . &nbspBlood flow to different parts of the body can be regulated more precisely to meet localized oxygen needs.

In many vertebrates, including humans, blood flows in two circuits; in an arrang

Question

In many vertebrates, including humans, blood flows in two circuits; in an arrangement called double circulation. Which of the following is not an advantage of double circulation over the single circulation organization found in fish?

Options:

A . Oxygenated and deoxygenated blood are present in separate compartments and prevent mixing of blood.

B . Oxygenated blood can be mixed with deoxygenated blood before passing through the tissues of the body.

C . The blood flows to the body tissues under higher pressure and faster, allowing for more efficient delivery of oxygen.

D . Blood flow to different parts of the body can be regulated more precisely to meet localized oxygen needs.

Answer: Option B
:
B
Oxygenated blood can be mixed with deoxygenated blood before passing through the tissues of the body. Having a pulmonary circulation and pump that are separate from the systemic circulation and pump allows the systemic pump to re-pressurize the blood flow as it leaves the heart for the body's tissues. This increases the rate at which oxygen can be delivered to the tissues.

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