Q1: Fill in the blanks:
(a) Joints of the bones help in the __________ of the body.
Ans: Movement
(b) A combination of bones and cartilage forms the __________ of the body.
Ans: Skeleton
(c) The bones at the elbow are joined by a __________ joint.
Ans: Hinge joint
(d) The contraction of the __________ pulls the bones during movements.
Ans: Muscles
Bicep Muscles
Q2: 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 cartilage are harder than bones.
Ans: False
(c) The finger bones do not have joints.
Ans: False
(d) The forearm has two bones.
Ans: True
(e) Cockroaches have an outer skeleton.
Ans: True
Q3: Match the items in Column I with one or more items of Column II.
Ans:
Q4: Answer the following:
(a) What is a ball and socket joint?
Ans: The rounded end of one bone fits into the cavity (hollow space) of the other bone. Such a joint allows movements in all directions, which is called a ball and socket joint.
(b) Which of the skull bones are movable?
Ans: The lower jaw bone or mandible is the only movable bone in the skull.
Lower Jaw(c) Why can our elbow not move backward?
Ans: Elbow joint is composed of the hinge joint. These joints allow movement in one plane and up to 180° only. Hence, we cannot move our elbows backward.
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1. How do muscles help in body movements? |
2. What are the types of joints in the human body? |
3. How does the skeletal system support body movements? |
4. Why is it important to have good posture? |
5. How can stretching help improve body movements? |
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