Blood circulation in a mammal is said to be double because? - SchoolNGR

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Blood circulation in a mammal is said to be double because?

Blood circulation in a mammal is said to be double because?

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Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE

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

Correct Answer: Option A

Explanation:
It is called a double circulatory system because blood passes through the heart twice per circuit.

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