Human_System

Human System Many of the earth’s systems are similar to human systems they have similar functions. I picked the two that I knew really could be seen by anyone that they are similar in the earth and in the human body. The two pairs I am going to compare are the water cycle to the circulatory system and skin to the layers of the earth. The water cycle is made up of Hydrogen, Oxygen, and other minerals. The earth has hydrogen and oxygen but also carbon, nitrogen, phosphate and a lot of other minerals. They both are made up of H2O because they are both primarily water. The water cycle has been in circulation for the entire life span of earth and a humans circulatory system is in circulation for their entire life span. People can not live with out their circulatory system and the earth can not function with out its water cycle. The water cycle starts when the sun’s heat evaporates water from the oceans into the atmosphere and form clouds. When the conditions are right the clouds release water as rain or snow. Most of the earth, water, skin, cycle, made, crust, blood, because, life, layer, circulatory, system, similar, oxygen, layers, body, people, out, old, new, important, both, two, things, systems, papillae, one, mantel, magma, live, hydrogen, human, circulation, been, around