The important life processes are nutrition, transportation, metabolism, reproduction, respiration, and excretion. Nutrition is the process of taking food by an organism and utilization of food for energy. This is a vital process which helps living beings to obtain their energy from various sources. Transportation and transportation system in plants and animals are entirely different. In animals, transportation is carried out through the circulatory system. This system includes heart, blood, and blood carrying blood vessels. Metabolism is the process in which different types of chemical reactions involved in controlling the living state of the cells in an organism. Reproduction is the biological process of reproducing their own offspring the continuity of species, generation after generation. Respiration includes the exchange of gases as well as burning of food. Animals have a well defined respiratory system for respiration. Elimination of toxic and waste substances from the body is called excretion. Plants produce waste products in the form of two gases