Question

_____circulation is used in highly active animals because it _____.

A.Open; rapidly transports food and oxygen
B.Open; does not circulate entirely within the blood vessels
C.Closed; does not circulate entirely within the blood vessels
D.Closed; rapidly transports food and oxygen

Answer 1

D. Closed; rapidly transports food and oxygen.

Step-by-step explanation:

Closed circulation is used in highly active animals because it allows for rapid and efficient transport of oxygen and nutrients to tissues. In closed circulation, the blood flows entirely within the blood vessels, which allows for better control of blood flow and pressure. This type of circulation is found in most vertebrates, including mammals, birds, and reptiles. In contrast, open circulation, which is characterized by blood flowing partly outside of the blood vessels, is found in some invertebrates like arthropods and mollusks.

Answer 2

The correct answer is D. Closed circulation is used in highly active animals because it rapidly transports food and oxygen. Closed circulation is a system in which blood is contained within a network of blood vessels, and does not mix with the interstitial fluid. This allows for more efficient transport of oxygen and nutrients to the tissues, and for the removal of waste products. Highly active animals, such as birds and mammals, require a high metabolic rate and therefore need a more efficient circulatory system to meet their energy demands.

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