Fill in the blanks:

a. Joints of the bones help in the ________ of the body.

b. A combination of bones and cartilages forms the ________ of the body.

c. The bones at the elbow are joined by a ______ joint.

d. The contradiction of ___________ pulls the bones during movement.

Answer the following:

a. What is a ball and socket joint?

b. Which of the skull bones are movable?

c. Why can our elbow not move backwards?

Indicate true (T) and false (F) among the following sentences:

a. The movement and locomotion of all animals is exactly the same. ( )

b. The cartilages are harder than bones. ( )

c. The finger bones do not have joints. ( )

d. The fore arm has two bones. ( )

e. Cockroaches have an outer skeleton. ( )

Write the type of joint which is used for each of the following movements :

(a) A cricket bowler bowls the ball.

(b) A girl moves her head in right and left direction.

(c) A person lifts weights to build up his biceps.

How many muscles work together to move a bone?

Provide one word answer to the statements given below.

1. Joint which allow movement in all directions.

2. Hard structure that forms the skeleton.

3. Part of the body with a fixed joint.

4. Help in the movement of body by contraction and relaxation.

5. Bones that join with chest bone at one end to the backbone at the other end.

6. Framework of bones which gives shape to our body.

7. Bones which enclose the organs of our body that lie below the abdomen.

8. Joint where our neck joints the head.

9. Part of the skeleton that forms the earlobe.

What would have happened if our backbone was made of one single bone?

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Name the type of joint of your hand which help you to grasp a badminton racquet.

Which of the following joints is immovable?

Which of the following parts of our body help us in movement?

(i) Bones

(ii) Skin

(iii) Muscles

(iv) Organs

Choose the correct answer from the option below.

Boojho fell off a tree and hurt his ankle. On examination the doctor confirmed that the ankle was fractured. How was it detected?