Page 32 - Viva ICSE Science 5 : E-book

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1. The skeletal system is a rigid framework of bones that provides support, shape and
strength to the body, and protects the internal organs.
2. The major bones of the skeleton include skull, limbs (bones of arms and legs), backbone,
ribcage (chest bone) and jawbone.
3. Besides providing shape to the body, bones perform various other functions—protection,
support, movement, production of blood cells and mineral storage.

4. The places where two or more bones meet or join together are called joints.
5. Joints provide fl exibility to our body by allowing bones to move in diff erent directions.
6. Muscles are bundles of elastic fi bres. They are fl exible, and thus, bring about movement
of all body parts.

7. There are three types of muscles present in our body—skeletal, smooth and cardiac
muscles.
8. Muscles control the movement of bones.

9. We can keep our bones and joints healthy by eating a balanced diet, taking proper rest,
maintaining a good posture and doing regular exercise.

EXERCISES

A. Fill in the blanks.

1. The lower arm has two long, parallel bones called ___________ and
___________.

2. The thigh bone is also known as ___________.

3. ___________ is a long fl at bone present in the front of the chest region.

4. Bones of the ankle have ___________ joints.

5. Muscles of arms, legs and neck are some examples of __________ muscles.

6. __________ promotes the production of vitamin D by the body.

B. Write (T) for true and (F) for false statements.

1. Of the 22 bones of the skull, 8 bones make up a protective

frame around the brain and the remaining 14 bones make
the jaws, and other facial structures.

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