Question

System of vessels and tubes in animals is called as

• A. Digestive system
• B. Circulatory system
• C. Respiratory system
• D. Reproductive system

Answer 1

Answer: (B)

Circulatory system

Human circulatory system, also called the blood vascular system consists of a muscular chambered heart, a network of closed branching blood vessels and blood, the fluid which is circulated. It is essentially a network of tubes that supplies to all living cells essential nutrients, O${}_2$ and other essential substances. Also, the waste or harmful substances produced are removed continuously for the healthy functioning of tissues.