Question

Q--Need of nervous system ..
(answer in points)


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Answer 1

Answer:

1. The nervous system helps all the parts of the body to communicate with each other.

2. It also reacts to changes both outside and inside the body.

3. The nervous system uses both electrical and chemical means to send and receive messages.

Hope it helps

Answer 2

The nervous system is made up of the central nervous system and the peripheral nervous system:

The brain and the spinal cord are the central nervous system.

The nerves that go through the whole body make up the peripheral nervous system.

The human brain is incredibly compact, weighing just 3 pounds. It has many folds and grooves, though. These give it the added surface area needed for storing the body's important information.

The spinal cord is a long bundle of nerve tissue about 18 inches long and 1/2-inch thick. It extends from the lower part of the brain down through spine. Along the way, nerves branch out to the entire body.

Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by a set of ring-shaped bones called vertebrae. They're both cushioned by layers of membranes called meninges and a special fluid called cerebrospinal fluid. This fluid helps protect the nerve tissue, keep it healthy, and remove waste products.