\tTransportation can be defined as the movement of any substance from one place to another.\tWater and nutrients required for all metabolic activities should be transported in the body of plants and animals.\tThe waste material or excretory products should also move to the region of excretion.\tTransportation in animal takes place through circulatory system which includes blood, blood vessels and heart.\tBlood is a fluid connective tissue consists of fluid medium called plasma.\tFunctions of blood are to transport food, oxygen, carbon dioxide, nitrogenous wastes, salts.\tA pumping organ is necessary to push the blood around the body.