The importance of the nervous system.

The nervous system is very important to humans and many other animals. The main organ of the nervous system is the brain. Thanks to him, all vital processes of the body are regulated. Also, impulses pass along the nerve fibers that lead to muscle movements. The nervous system is necessary for reflexes to stimuli, for the perception of changes in the environment, etc. In some animals, the nervous systems are very simple. For example – with an earthworm. It does not have a brain, but only an accumulation of neurons.