Question

What is excretion?Need of excretion and parts of excretory system.

Answer 1

the removal of waste material from our body is called exertion

Answer 2

The removal of unwanted metabolic wastes from our body is defined as excretion.

Excretion is removal of harmful nitrogeneous wastes such as urea , ammonia and others from our body.

The kidney is the chief excreting organ in our body.

The kidney contains nephrons for doing the excretion .

They extract the wastes from blood and help to excrete the unwanted nitrogeneous wastes from our body.

Sweating is not excretion because that is done incidental and for other purposes . It only leads to cooling.

Excretion is very important as if excretion is not done and if wastes are left to accumulate in the blood after a certain level , the organism may die because urea and other wastes are poisionous.