Nervous System Facts
Friday, September 25, 2009
Instructions
Parts Of The Nervous System
Step 1:
The central nervous system, which is made up of the brain and spinal cord, is responsible for producing nerve impulses and motor signals in the body. The peripheral nervous system, which contains nerves, transports nerve impulses to different parts of the body.
Spinal Cord
Step 1:
In men, a spinal cord is a bundle of nerve tissue that is about 17.7 inches long on average. Females have spinal cords that are about 16.9 inches long, according Gary Farr's article on Becominghealthynow.com entitled "The Nervous System-Advanced Version: The Central Nervous System."
Brain
Step 1:
The brain weighs approximately 3 lbs. and contains two cerebral hemispheres with four lobes each. The frontal lobe is responsible for speech, motor and problem-solving skills and emotions; the parietal lobe, responses to stimuli; the temporal lobe, hearing and memory; and the occipital lobe, vision.
Neurons
Step 1:
According to an article by Eric Chudler called "Types of Neurons (Nerve Cells)" on the University of Washington website, the body contains trillions of neurons, or nerve cells, which are carrying messages toward and away from the central nervous system.
Protective Structures
Step 1:
The skull is made up of a series of bones that surround the brain. Vertebrae are ring-shaped bones that protect the spinal cord and contain membranes and cerebrospinal fluid, according to an article called "Brain and Nervous System" on Kidshealth.org.
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