In the inhalation process, we take oxygen gas, but in the exhalation process, we expel carbon dioxide gas and water vapor, so, the respiration process includes two processes which are inhalation and exhalation.
We can not live without the air, It contains oxygen gas which burns the small particles of the digested food to produce energy, carbon dioxide gas and water vapor and this process is called...
The excretory materials are carbon dioxide, nitrogenous wastes, excess salts, and excess water, They are the waste materials which produced inside the cells and the body must get rid of them.
