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

Biology
JAMB 2021

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

  • 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
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Correct Answer: Option A
Explanation

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

There is an explanation video available below.

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Explanation Video

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