Solutions of NCERT Exemplar Solutions for Class 6 Chapter 8 – Body Movement

 1. Solution:

(a): (i) and (iii)

Bones form the structural framework of a body called a skeleton. The skeleton along with muscles helps our body parts to move. Bones are hard and cannot bend on their own. The joints help the body in moving.

Muscles are like elastic bands which are attached to the bones by means of tough connecting bands called tendons. Muscles help in the movement of bone through pull/contraction. Bones are wrapped up by muscles.

2. Solution:

(c): Upper jaw and skull

Upper jaw and skull have immovable joints since they are fixed joints.

3. Solution:

None.

Human beings and dogs have endoskeleton and muscles.

Snails have exoskeleton and muscles.

Earthworm does not have a skeleton. It has two sets of muscles one that makes it long and thin and the other that makes it fat. The contraction and relaxation of

these muscles help in movement.

4.  Solution:

(a): swim easily in water

Divers while swimming wears fin-like flippers on their feet because the muscle in the feet contracts, generating a curve on one side like a wave and the fin-like flippers move on the opposite direction exerting force against the surrounding water that pushes the underwater divers forward.

5. Solution:

(c): muscular foot

The muscular foot of the snail comes outside and attaches to the ground during locomotion. The foot of a snail has a special gland that produces slimy mucus to make slippery track to help it move smoothly.

6. Solution:

(b): Two

7. Solution:

Hinge joints present in our fingers help us to grasp the things like badminton racquet.

8. Solution:

If our backbone was made of one single bone we would not have been able to bend and twist our back.

9. Solution:

Here are the one-word answers:

1. Ball and socket joint
2. Bone
3. Upper jaw with the skull
4. Muscles
5. Ribs
6. Skeleton
7. Pelvic bones
8. Pivotal joint
9. Cartilage

10. Solution:

(a) Hinge joint and ball and socket joint

(b) Pivotal joint

(c) Hinge joint