Why is blood needed by all the parts of a body?
Blood is needed by all parts of the body for transport of materials in the body. It performs the following important functions:
- It transports 02 from the lungs to all the body cells.
- It carries C02, a waste product back to the lungs so that it can be exhaled easily.
- It transmits heat, thus regulating the body temperature.
- It also fights off diseases and infections.