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Q. 3. Which bones enclose by the team Gait of
Answers
Answer:
hind limbs
Explanation:
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Answer:
Explanation:
Earthworm
The body of an earthworm is made up many rings joined in an end-to-end manner
It is able to expand and shorten its body because of the presence of muscles
It extends its front portion first while the rear portion is at rest, fixes its front portion firmly then releases rear portion to extend it forward while shortening its body, thereby covering small distances
Repeated muscle contractions and relaxations enable movement of earthworm in the soil. It is further aided by the secretion of a slimy substance.
It is able to fix its body parts to the ground because of the presence of small bristles projecting out of its body which is connected to the muscles. They help earthworms to get a grip on the ground.
Snail
A snail carries a hard outer covering called as a shell, it is made of calcium carbonate.
The shell is dragged by the snail, and it does not help in their locomotion.
Shell has an opening through which the body and head project out. The body is made up of muscles and is the foot of the snail. Shells protect snails from their predators.
They move in a wavy motion
They propel by riding on a layer of mucus, through muscle contractions of the foot
It secretes mucus which enables swift movement.
Cockroach
They walk, climb, fly and prefer to live in damp but warm places
They have three pairs of legs which help in walking and is covered by a hard exoskeleton
The outer skeleton is made up of a series of plates which enables its movement
They have distinct muscles, walking is brought about by the muscles near the legs
Flying of a cockroach is aided by muscle movement of the wings
Their body is divided into three regions- head, thorax and abdomen
Each leg consists of five segments
They have two pairs of wings which are poorly developed but still manage to fly. The wings are formed as a result of outgrowths of integuments.