Question

Draw a sectional view of the human heart and label on it the following parts:
i) Aorta
ii) Pulmonary arteries
iii) Vena cava from upper body
iv) Left ventricle
b) why is double circulation of blood necessary in human beings?

Answer 1

Explanation:

Why is the Double Circulation of Blood Necessary in Human Beings? Double circulation in human beings allows the separation of oxygenated and deoxygenated blood in the body. It helps in maintaining a high blood pressure required for essential processes.

Answer 2

Explanation:

see if double circulation will not be there how can oxygenated blood will come from lungs .