Body Movements
Chapter 8
Exercises (অনুশীলনী)
1. Fill in the blanks:
(a) Joints of the nones help in the of --------------- the body.
Ans:-
(b) a combination of bones and cartilages forms the ---------------- of the body.
Ans:- jaws.
(c) The bones at the elbow are jhoined by a ------------------ joint.
Ans:- Hinge.
(d) The contraction of the ------------------- pulls the bones during movement.
Ans:- muscle.
2. Indicate true (T) and false (F) among the following sentences.
(a) The movement and locomotion of all animals is exactly the same.
Ans:- false.
(b) The cartilages are harder than nones.
Ans:- false.
(c) The finger bones do not have joints.
Ans:- false.
(d) The fore arm has two bones.
Ans:-
(e) Cockroaches have an outer skeleton.
Ans:-
3. Match the items in Column 1 with one or more items of Column II.
Ans:- Upper elbow - unmanageable joints
Fish - dhara unstoppable body
The kamihad - maintains the liver
Kumjelakuwa - shows slow movement
Pistachios - there are birds in the body
- Can fly in the air
- There's an external jaw
Columan I
Columan I
Upper jaw
have fins on the body
Fish
has an outer skeleton
Ribs
can fly in the air
Snail
is an immovable joint
Cockroach
protect the heart
shows very slow movement
have a streamlined body
4. Answer the following:
(a) What is a ball and socket joint?
Ans:- Some bones in the body appear in such a state - one round end of one bone is embedded in the spherical pit of another bone. In such a joint the bone can move around. This is called the ball and socket joint.
(b) Which of the skull bones are movable?
Ans:- The organs formed by the soft ness of the laokhola move.
(c) Why can our elbow not move backwards?
Ans:- Why can't we turn the elbows back because we have a wrist joint on our elbows.
