Answer: 1 False, 2 False, 3 False, 4 True, 5 True
|Column I||Column II|
|(a) Upper jaw||(1) Have fins on the body|
|(b) Fish||(2) Has outer skeleton|
|(c) Ribs||(3) Is an immovable joint|
|(d) Snail||(4) Protect the heart|
|(e) Cockroach||(5) Shows very slow movement|
Answer: (a) 3 (b) 1 (c) 4 (d) 5 (e) 2
What is a ball and socket joint?
Answer: In this joint the rounded end of one bone fits into the cavity (hollow space) of another bone. It permits movement in all directions.
Which of the skull bones are movable?
Answer: Lower jaw bone or mandible is the only movable bone in the skull.
Why can our elbow not move backwards?
Answer: Elbow joint is composed of hinge joint. These joints allow movement in one plane and up to 180° only. Hence, we cannot move our elbows backwards.
What are the main functions of the skeleton system?
Asnwer: Functions of the skeletal system are as follows:
Name the various organs of the skeletal system.
Asnwer: Various organs of the skeletal system are: skull, vertebral column, rib cage, bones in arms and legs, shoulder bone and hip bone.
Give an example of pivot joint in the human body.
Asnwer: The joint between skull and first vertebra
What is slithering movement?
Asnwer: Movement of a snake is called slithering movement.
How many vertebrae are found in the human backbone?
Asnwer: There are 33 vertebrae in the human backbone.
How many ribs are found in the rib-cage of humans?
Asnwer: There are 12 pairs of ribs in the rib-cage of humans.
How does a snake move?
Asnwer: A snakes moves by making loops on its sides.
How does a fish swim in water?
Asnwer: When a fish swims; its front part curves to one side and the tail part stays in the opposite direction. In the next move, the front part curves to the opposite side and the tail part also changes its position to another side. The tail fin helps in changing direction.
How does the snail move?
Asnwer: A snail moves using its muscular foot.
How many bones are found in the human skeleton system?
Asnwer: There are 206 bones in the human skeleton.
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