A Human Is A Complex Organism

Human beings are complex and special organisms as there is a complex organisation of cells in the benevolent body. The organisation in the human body is summarised as follows Cells Tissues Organs Systems Organism.The same type of cells which drive out a specific function are nonionized into a tissue. For example, a group of nerve cells form a nerve tissue. They are organised to work together to perform specific functions as the emergence of cells in the human body do not work individually.An organ is a group of tissue that cooperates to carry out a specific spirit process. For examples, epithelial tissues form blood vessels. Several organs are organised into a system.Each system consist of several organs which are organised to carry out life processes such as respiration, reproduction and digestion.Various systems in the human body are well organised to carry out all the life processes efficiently. They are able to function because the cellular components work together to ensur e the survival of human beings.The human brain is well developed to integrate informations and interject them as memory. This resigns human beings to have the ability to talk, think rationally, create new things, learn from experience and use languages. The ability to do all these makes us rattling special compared to other organism.Water is driven into the tanks to raise density and allow the submarine to sink and it also pumped out to reduce density and hence allow the submarine to float. The tanks can be fill up with water and air, which allows the submarine to sink or rise in the water. When a submarine is floating, its ballast tanks are filled with air, which makes it less dense than the sea water it displaces hence allowing it to float. Submarines sink when water is let into the ballast tank. This is because the submarines density becomes greater than that of the surrounding water, resulting in negative delicacy and causing it to sink.