7.4-External structures and functions of Animals-1

Most animal moves, so they need a ___________ for moving.

• Support system

• Muscles

• Bones

• Brain

A hard external covering that is waterproof.

• Exo-skeleton

• Endo-skeleton

It protects the soft body underneath.

• Function of Exo-skeleton

• Function of Endo-skeleton

Other name for large exo-skeleton.

• Shells

• Ribs

• Skull

It protects it from sunlight and water loss. It helps in camouflage.

• Snail’s exo-skeleton

• Human's skeleton

• Fish's skeleton

It helps to protect its wings.

• Snail’s exo-skeleton

• Human's skeleton

• Fish's skeleton

• Ladybug’s exo-skeleton

It protects its internal structure from the aquatic environment. It is waterproof.

• Snail’s exo-skeleton

• Human's skeleton

• Ladybug’s exo-skeleton

• Crab’s shell