The biosphere is the biological component of earth systems, which include the lithosphere, hydrosphere, atmosphere and other spheres. The biosphere includes all living organisms on earth, together with the dead organic matter produced by them. Biosphere is the layer of the planet Earth where life exists. This layer ranges from heights of up to ten kilometers above sea level. The layer of the Earth containing life is thin. The upper atmosphere has little oxygen and very low temperatures. The biosphere extends from the deepest root system to trees, to the environment of ocean trenches, to lush rain forests and high mountain tops. Earth in terms of spheres. The solid surface layer of the Earth is the lithosphere. The atmosphere is the layer of air that stretches above the lithosphere. The Earth’s water—on the surface, in the ground, and in the air—makes up the hydrosphere. Since life exists on the ground, in the air, and in the water, the biosphere overlaps all these spheres.