QABiology › Which of the following animals has a heart in which oxygenated and deoxygenated blood mix?
Q

Which of the following animals has a heart in which oxygenated and deoxygenated blood mix?

1. human

2. fish

3. frog

4. bird

5. mammal

A

In the circulatory system of living organisms, the most common case is of oxygenated and deoxygenated blood in the heart, flowing or being carried in separate channels or paths. This, however, is not the case for all living organisms, as some organisms have a system in which both oxygenated and deoxygenated blood in the heart are mixed, rather than separate.

Humans have distinct heart compartments, so there is no mixing of blood. Birds and mammals have hearts that separate oxygenated and deoxygenated blood. For fish, blood flows unidirectionally without mixing, while frogs have hearts that mix oxygenated and deoxygenated blood.

3 months ago
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