That area on lithosphere,hydrosphere and atmosphere where living organisms are found is called 'Blosphere'. Among all planets the biosphere exists only on the earth. The biosphere includes human. beings, vegetation, animals and microorganisms. Living organisms on the earth receive their food and other needs from the blosphere. The living organisms of the blosphere provide the world with a variety of food and raw materials. The existence and maintenance of life depends on the biosphere.