Hello,

Components of blood :

1. Plasma : main component, mostly consists of water, proteins, ions, wastes mixed together.

2. Red blood cells : they are responsible for carrying oxygen, carbon di oxide and also for the colour of the blood.

3. White blood cells : also called lymphocytes, their main function is immune response.

4.platelets: this component of blood is responsible for clot aggregation after bleeding.

Excretion : it is the process through which wastes of our body get eliminiated. Lungs, kidneys and skin are the prime sites for this life process.