Lesson - 3
Bones, Joints and Muscles
Class - V
Subject - Science
A. Tick the correct answer.
1. The ............ is made up of 22 bones.
. Rib cage b. Skull c. Spine d. Limb
Answer : skull
2. Rib cage protect the ...............
a. Heart. b. Brain c. Arm d. Nose
Answer : heart
3. Hip joint is an example of .............
a. Ball and socket joint b. Hinge joint
c. Gliding joint c. Pivot joint
Answer : Ball and socket joint
4. The muscles which are in our control are ..........
a. Cardiac b. Skeletal c. Smooth d. Both a and b
Answer : Skeletal
5. Tendons help in attaching .........
a. Bone to bone b. Skull bones
c. Muscle to muscle d. Bone to muscle
Answer : bone to muscle
B. Fill in the blanks.
1. The skull protects the ............
Answer : brain
2. Heart and........ Are protected by the rib cage
Answer : lungs
3. We have........... pairs of ribs
Answer : 12
4. ............. muscles are seen only in heart
Answer : cardiac
5. Pivot joint is seen between head and the first bone of.....
Answer : vertebrae.
C. Match the columns.
Columns A Columns B
1. Skeleton a. 33 bones
2. Vertebral column b. 8 bones
3. Limb c. 206 bones
4. Rib cage d. 30 bones
5. Skull (upper part) e. 12 pairs of bones
Answer : 1 - c , 2- a, 3- d , 4- e, 5- b
D. Where will you find the following in your body?
1. Tendon
Answer : between bone to muscle
2. Ligament
Answer : between bone to bone
3. Pivot joint
Answer : between the skull and the first two to vertebare
4. Hinge joint
Answer : between two or more bones where the bones can only move along one direction
5. Cardiac muscle
Answer : cardiac muscles are found only in our heart.
6. Skeletal muscle
Answer : Skeletal muscles are attached to the bones.
7. Gliding joint.
Answer : Ankle and wrist.
E. Answer the following questions.
1. What is skeleton?
Answer : A skeleton is the hard structure that protects the internal organs of a living thing.
2. What is the importance of skeleton?
Answer : The skeleton supports the skin, muscle and tissue, and all the organs that are inside the body. The skeleton protects important internal organs like the brain, heart and lungs.
3. Explain ball and socket joint with diagram.
Answer : in ball and socket joint, one of the bones has rounded head, which is the ball. This ball fits into a cup shaped and of other bone. The cup shaped part of the bone is known as socket.
Ball and socket joint
4. What do you mean by voluntary muscles ?
Answer : the muscles that are attached to the bones are known as skeletal muscles and as they are in our control. They are also known as voluntary muscles.
5. What is the importance of cardiac a muscles ?
Answer : Cardiac muscle works to keep our heart pumping through involuntary movements.
