The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent ...

Excretion is the process of removal of toxic wastes from the body of an organism. The major wastes produced by us are: Carbon dioxide and Urea. Carbon dioxide is produced by the process of respiration ...

Plants and animals are made up of cells. For sustaining the life of an organism cells plays an important role. These cells work in the form of biochemical reactions which carry out all the time. These ...