Page 2 - 2. Lesson Notes- Movement and locomotion Part- I

MOVEMENT IN SNAIL

• A snail has a slimy body without bones.
• It has a shell for protection.
• It has a pair of tentacles with eyes at the tip of its shell.
• It moves with the help of a muscular organ known as the foot.
• It makes a wave-like movement by expanding and contracting the muscles in the
foot.
• It secretes a slimy substance known as mucous that enables the snail to move
with ease.

MOVEMENT IN COCKROACH

• A cockroach can walk, run, climb, and also fly short distances.
• Its body is divided into three parts-
❖ Head
❖ Thorax
❖ Abdomen
• The thorax is the middle part of the body that bears two pairs of wings
and three pairs of jointed legs for movement.
• It has a pair of sensitive antennae located on its head. These enable it
to sense and smell.

• It walks in a unique manner moving three legs at a time.

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