Blood circulation in a mammal is said to be double because?
Question
Blood circulation in a mammal is said to be double because?
Options
A)
it passes twice through the heart in a complete circuit
B)
it moves in both arteries and veins
C)
it circulates in both the heart and other organs
D)
the heart contains auricles and ventricles
The correct answer is A.
Explanation:
It is called a double circulatory system because blood passes through the heart twice per circuit.
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