Transportation in human beings.

1.	Transportation in human beings.
Answer» \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.\tHeart is the muscular pumping organ which pushes the blood around the body.\tTube like structure through which carry blood to cells, tissues and organs are called as blood vessels.\tTwo special blood vessels are arteries and veins.\tAfter reaching the organs, the arteries divide in to small branches called as capillaries.\tHeart in another component of circulatory system which is also known as pumping organ.\tHeart consists of four chambers separated by a partition to avoid mixing of oxygenated and deoxygenated blood. Breathing breatheing Brithing

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