Question

why excreation if useless substance by body is so important?​

Answer 1

Answer:

hey mate here is your answer...

Explanation:

Body Waste: Urine. ... In your body, the excretory system helps to keep salts and urea from building up to dangerous levels and becoming toxic. The kidneys are two bean-shaped organs that remove these toxins from your blood and produce urine to carry them from the body.

hope it will help you...

thank you..

Answer 2

Excretion is important because useless substances made by our body are harmful to us if it stays inside our body like urea.