1. Earthworm


  • The body of the earthworm is made up of many rings joined end to end.
  • The earthworm moves by alternating expansion and contraction of the body using muscles.
  • Its body secretes a slimy substance which help in movement.
  • Tiny bristles (hair like structure) are present under its body, these bristles are connected to the muscles and help to get a good grip on the ground.


2. Snail


  • They move with the help of muscular feet.
  • They have a rounded structure which is the outer skeleton of a snail.


3. Cockroach


  • They have 3 pairs of legs and 2 pairs of wings.
  • It flies with the help of wings and walk with the help of strong muscles of legs.
  • This outer skeleton is made up of number of plates joined together that allows movement.


4. Birds


  • Birds like Sparrow, crow, pigeon, parrot, Hen, duck, swan can walk as well as fly with the help of hollow bones.
  • The bones of the hind limbs are used for walking and perching , while the bony part of the forelimb is modified as wings.
  • The breast bones are modified to hold muscles of flight which help to move the wings up and down.


5. Fish


  • Their body is streamlined.
  • Fish swim by forming loops alternately on two sides of body.
  • The movement is helped by the fins and tail which allow the fish to change its directions.
  • Fish has powerful body muscles. The powerful body muscles of the fish on the sides help in moving its tail on both sides.


6. Snake


  • They slither/crawl on ground by looping sideways.
  • A large number of bones and associated muscles push the body forward.
  • They have a long backbone and thin muscles.
  • Long body of snakes makes many loop s and each loop gives it a push.
  • They move very fast, but they do not move in a straight line.
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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo