what is double circulation
Double circulation is the type of blood circulation in which blood passes through the heart twice during one complete cycle of the body.
It is found in humans, birds, and mammals.
Two parts of double circulation
Pulmonary circulation
Blood flows:
Heart → Lungs → Heart
In the lungs, blood receives oxygen and releases carbon dioxide.
Systemic circulation
Blood flows:
Heart → Body parts → Heart
Oxygen-rich blood is supplied to the body tissues.
Advantages of double circulation
Prevents mixing of oxygenated and deoxygenated blood
Ensures efficient oxygen supply to body cells
Helps maintain high energy production
Importance
Double circulation makes the circulatory system more efficient and supports complex body functions in humans and other warm-blooded animals.