Why are the bones important in our body?
Q. 11. Name any two problems related with bones.
Q.12. How many bones are there in a newborn baby? How it becomes 206 bones by adulthood?
Q.13. Sia fractured her leg while playing. Doctor plastered her leg and advised her to take calcium tablets and milk regularly. He also asked her to get plenty of sunlight. Sia followed the doctor’s advice.
(a) What is fracture?
(b) Why did the doctor advise Sia to take calcium tablets?
(c) Why did the doctor ask Sia to get plenty of sunlight?
Q.14. 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 left and right direction.
(c) A person lifts the weights to build up his biceps.
(d) Joint of your hand which help you to grasp badminton racquet.
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Answer:
Bones support your body and allow you to move. They protect your brain, heart, and other organs from injury.
2.
Bone Cancer.
Bone Density.
Bone Infections.
Osteogenesis Imperfecta.
Osteonecrosis.
Osteoporosis.
3.
a.300
b.they become 206 bcoz two or more bones join to make one complete bone.
4.
a.A complete or partial break in a bone.
b.Because calcium is good for bones and it strengthens bones.
5.
a. Ball and socket joint
b. Pivot joint
c. No single muscle would be most active.
d. hinge joint.
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