Question on: JAMB Biology - 2018
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 hands and other organs
D
The heart contains auricles and ventricles
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Correct Option: A
Blood circulation in human beings is known as double circulation just because the blood is pumped twice ( from two different sections involving Deoxygenated and oxygenated blood) simultaneously through heart, one carries out the pulmonary circulation and other the heart- to- body- circulation.
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