Definitions

The Nervous System: The Nervous System is a Your nervous system is the control and communication system of the body. Its job is to send and receive messages. Your nervous system controls all your thoughts and movements.

The Cranial nerves: The Cranial nerves go from the brain to the eyes, mouth, ears, and other parts of the human head.

The Peripheral nerves: The Peripheral nerves go from the spinal cord to your arms, hands, legs, and feet.

The Autonomic nerves: The Autonomic nerves go from the spinal cord to the lungs, heart, stomach, intestines, bladder and sex organs.

The Central nerves: The Central nerves are in the brain and spinal cord.

The Brain: The Brain is the command center of your entire body. The brain is the body's main information center. It is made of billions of neurons. The brain helps the body respond to the information it receives from the senses. The brain also processes thoughts. When you think, neurons in your brain are working.

The Spinal Cord: The spinal cord is a tube of neurons that runs up the spine and attaches to the brain stem. Information from nerves that branch out to the rest of the body goes to the spinal cord. Some messages are processed by the spinal cord but most information is sent on to the brain.

I hope these definitions help you understand these words better!

The Central Nervous System's Part's

The central nervous system is divided into two parts: the brain and the spinal cord. The average adult human brain weighs 1.3 to 1.4 kg (approximately 3 pounds). The brain contains about 100 billion nerve cells (neurons) and trillons of "support cells" called glia. The spinal cord is about 43 cm long in adult women and 45 cm long in adult men and weighs about 35-40 grams. The vertebral column, the collection of bones (back bone) that houses the spinal cord, is about 70 cm long. Therefore, the spinal cord is much shorter than the vertebral column.

The Nervous System

A human has a nervous system with about 60,000,000,000 nerve cells. The nervous system controls your body's communication system. A nerve is a fibre or a bundle of fibres through which impulses especially of sensation and motion pass between the brain ot spinal cord, and the eyes, ears, muscles, glands, etc. Millions of nerves signal to enter your brain every single second. In many places, sensory nerves ( which carry sense signals from the body to the brain) run alongside the moter nerves ( which carry the brains commands telling the muscles to move). The nervous system has 3 main parts, the central nervous system, the peripheral nervous system , and the autonomic nervous system. Each one of these parts has a special function. The central nervous system is the brain or spinal cord, it is made up of the nerves that branch out to the central nervous system. c.n.s is the abreviation for the central nervous system. The nervous system is a very important system within a system in our body. Without it we would not be able to move, think, or feel.