Multiple Choice
Mammalian and bird hearts
A) pump only oxygenated blood.
B) pump only oxygen-depleted blood.
C) pump both oxygenated and oxygen-depleted blood but the two do not mix in the heart.
D) have only partially divided ventricles,to allow mixing of oxygenated and oxygen-depleted blood.
E) is a single circulatory loop system.
Correct Answer:
Verified
Correct Answer:
Verified
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