Question

why the excretion is a necessary process for human being​

Answer 1

Answer:

There is always removal of waste products for our body to purify it.

So excretion is necessary.

Answer 2

Answer:

Hey mate!

Excretion maintains homeostasis, the natural, internal balance of an organism's system. The excretion of solid wastes rids organisms of toxins that can pollute the cell and cause death. Also excretion is important to maintain body temperature in multi-cellular organisms such as vertebrates.