1.Name different parts of brain. Which part of brain is known as centre of intelligence?
2.How is the brain protected ?
3.How do ears help us to listen ?
4.Mention three ways to take care of our eyes.
5.What are the effects of force?
6.Differentiate between first-class lever, second-class lever and third-class lever.
Answers
Answer:
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Answer:
What Are the Parts of the Nervous System?
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.