Information transmitted through the central nervous system tells our bodies how to react in a certain situation, such as when we want to take a step the brain tells our knee?joint?to bend, or when we touch something hot we receive information giving us a burning sensation. The CNS also sends information about infection so that the appropriate organ that?can fight certain types of bacteria. It is a common misconception that the brain is the largest organ in the human body, when in fact it comes in at third largest after the skin and the?liver?respectively.
The central nervous system also controls our second system of the body, the cardiovascular system (also known as the circulatory system) which delivers?blood?and oxygen to the various parts of the body. The relationship between these two systems is quite complicated as each has an effect on the other. If we take the?heart?for example which is a key organ in the cardiovascular system, we can think that it feeds the brain and as such the CNS with oxygen and blood, but at the same time it is the brain that controls the heart telling it how often to beat.
transmit? ? 傳輸
take a step? ? ?邁步
sensation? ? ? ?感覺(jué)??
CNS = central nervous system? ? ?中樞神經(jīng)系統(tǒng)
circulatory ?(血液/液體） ?循環(huán)的??
circulatory system? ?循環(huán)系統(tǒng)?
