Q14 of 20 Page 46

Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?

Any kind of movement occurs at Joints. Joint is a place where two bones meet.


Elbow Joint and Knee Joint are hinge joint, where movement occurs in one direction.


More from this chapter

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12

Given below is a list of different types of movement in animals.

Running, Jumping, Walking, Slithering,


Crawling, Flying, Swimming, Creeping


Write the type of movement seen in each animal.


(a) Duck


(b) Horse


(b) Kangaroo


(d) Snail


(e) Snake


(f) Fish


(g) Human beings


(h) Cockroach

 13

Boojho fell off a tree and hurt his ankle. On examination the doctor confirmed that the ankle was fractured. How was it detected?

 15

Which type of movement would have been possible if

(a) our elbow had a fixed joint?


(b) we were to have a ball and socket joint between our neck and head.

 16

Earthworms are known as ‘farmer’s friends’. Why?