The Nervous System

How does the structure of the nervous system control its functions and ensure you have a healthy body?

The function's of the nervous system

The nervous system is the major controlling, and communicating system in the body. It is the part of your body that controls all mental activity including thought, learning, and memory. The nervous system also controls body movements as well, which are messages that are sent around your body. When you walk for example your nervous system is allowing to do that, along with the help of many other systems. When you walk your brain sends messages to your spinal cord which send messages to you neurons in your legs telling you to walk. The medulla is a part of the brain that controls involuntary actions. One of those actions is beating your heart. Another function the nervous system does is it lets you feel pain. If you did not feel pain you would end up hurting yourself more by not stopping and treating your pain. The nervous system also controls reactions.Lets say some one threw a rock and it was coming your way, you would naturally duck thanks to your nervous system. Another function your nervous system does is emotions. Your brain controls emotions you have, whether you are sad or happy that emotion comes from your brain.

Parts of the nervous system

Structure of the nervous system

The structure of the nervous system

The structure of the nervous system is essential for making the system function correctly. They are three main parts of the nervous system.

The brain is by far the most important part of the nervous system. Its has three main parts, the cerebrum, cerebellum, and the medulla. The medulla is also know as the brain stems and it connects to the spinal cord. The medulla controls breathing, heart rate and blood pressure. Those are all involuntary actions, if we did not have the medulla we would have to constantly tell our heart to beat. The cerebrum is in charge of perception, thought, imagination, judgment, and decision making. The cerebrum is also the largest part of the brain. The cerebellum controls coordination, balance, voluntary motor movements, sense of position of the different parts of your body,and memory. This is the second largest part of your brain. The Hypothalamus is the part of the brain that controls hunger/thirst, and regulation of body temperature.

Your spinal cord play a big part in sending messages to other nerves in your body. When the brain has a message it send it to the spinal cord which sends it to the part/s of the body it needs to go. The spinal cord is made out of bundles of neurons that carry impulses from all parts of the body to the brain and impulses from the brain to all parts of the body. The spinal cord is protected by your vertebrae.

The nerves in your body are also part of your nervous system. In fact the nervous system got its name from the nerves. Nerves are made up of 7 parts. These parts are, cell body, neurons, nucleus, dendrite, axon, myelin sheath, and nodes of Ranvier. These nerves are all over your body helping transfer messages as well as protect you.

Keeping your nervous system healthy

One way to keep your nervous system healthy is to wear a helmet when doing physical activities like riding a bike. This is because if you fall hard enough and hurt your head you could damage your brain. Another way to keep your nervous system healthy is the have lots of Vitamin B. Vitamin B is a major part in keeping your nervous system healthy. Another way to keep your nervous system healthy is keeping it working. Try to read each day, reading keeps your brain active. Just like you your brain needs to work out and reading or writing is a great way to do that. Puzzles are also good at challenging your brain. The most important way to keep your nervous system healthy is to not take drugs or abuse alcohol use. Alcohol and drugs mess with your brain and can make you do thing you would not normally do.


  • Alochol
  • Drugs
  • Damage to the spinal cord
  • Damage to the brain
  • Damaged nerves


The nervous system is interdependent with every body system. This is because the nervous system is the control center for the whole body. It is the system that controls thought, speech heart beat, and many other crucial activities your nervous system does.