Question

ii) Identify the incorrect statement about double circulation

a) it occurs in mammals
b) it occurs in all vertebrates

c)it is composed of systemic circulation

d) it is composed of Pulmonary circulation​

Answer 1

Answer:

b) it occurs in all vertebrates

Answer 2

Answer: The incorrect statement is (b); it occurs in all vertebrates.

Explanation:

• When blood circulates twice through the heart during an one complete cycle, it is known as Double circulation. It is found in frogs, reptiles, birds, and mammals not in all vertebrates.

• All vertebrates have closed circulatory system i.e. closed vessels in this system transport blood throughout the body.
• Double circulation consists of systemic and pulmonary circulation.
• The transfer of oxygenated blood from the left ventricle of the heart to the aorta is referred to as systemic circulation.
• The right ventricle sends deoxygenated blood to the pulmonary artery, which subsequently transports it to the lungs for oxygenation. This process is known as pulmonary circulation.

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