Nervous System

Function: nerve cells and fibers that transmit information through out the body.


Neurons: long, stringy, neurons are perfect for carrying the electrical messages to the body

The Brain: the command center, made of billions of neurons, helps the body respond to information it receives from the senses, the brain has three parts, the largest is the cerebrum it controls vision, touch and other senses, cerebellum helps control balance and coordination, the brain stem controls digestion, breathing and heartbeat.

Spinal Cord: tube of neurons that runs up the spine and attaches to the brain stem.

Five Fun Facts:

1. the adult brain consist of 100 billion neurons.

2. babies brain consist of about 10 million neurons when they are born.

3. humans on average use only four percent of the cells in their brains at one time.

4. the human nervous system is divided into 2 parts: central nervous system and peripheral nervous system.

5. our bodies contain 43 nerve pairs which connect the central nervous system to the rest of our body.

The nervous systems controls the body and regulates the other parts of the body to maintain homeostasis. A deviation from a normal set point acts as a stimulus to a receptor in the brain, which sends nerve impulses to a ceneter in the brain that is responsible for regulating. The brain directs an act in such a way that an adaptive response takes place

The nervous system controls and send signals to the other systems in the body telling them what to do.

A disease that can harm the nervous system would be Alzheimer's disease. Alzheimer’s disease is an irreversible, progressive brain disease that slowly destroys memory and thinking skills, and eventually even the ability to carry out the simplest tasks.