What is the advantage for birds and mammals of having a four-chambered heart?
A) It allows for complete separation of systemic and pulmonary circulation.
B) It allows for complete separation of oxygenated and deoxygenated blood.
C) It allows for different pressures in the systemic and pulmonary circuits.
D) It allows for increased supply of oxygenated blood to active tissues.
E) All of these choices are correct.
Correct Answer:
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