Blood circulation in a mammal is said to be double because?
-
it passes twice through the heart in a complete circuit
- it moves in both arteries and veins
- it circulates in both the heart and other organs
- 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.
There is an explanation video available .