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.
