Movement in Snail and Cockroach


 
 
Concept Explanation
 

Movement in Snail and Cockroach

Snail and Cockroach: 

The snail carries a house on its back. It is a skeleton which is outside the body, but is not made up of bones. Such a skeleton is known as an exoskeleton. Crabs and insects such as cockroaches also have exoskeletons. Exoskeletons give support and protection and also allow movement at the joints. The snail has a thick structure called a foot. The foot produces a slimy substance called mucus which reduces the friction between foot and ground surface. A trail of mucus is left behind when snail crawls.The muscles of snail make them to move forward It is made up of strong muscles. It produces a series of wave-like movements that push the snail’s body forward.

                                               

Sample Questions
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Question : 1

Shell  _______________________

Right Option : D
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Question : 2

Snail moves with the help of its ________________

Right Option : C
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Question : 3

Crabs and insects such as cockroaches have ____________________ .

Right Option : B
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