Topic 7 Lesson 4 External Structures and Functions of Animals

A ladybug's __________ helps to protect its wings.

• Fur

• Characteristics

• Skin

• Exoskeleton

A crab's shell helps protect its ____________ structure from the aquatic environment it lives in.

• Internal

• Characteristics

• Skin

• Exoskeleton

The support structure for some animals is an _______________.

• Internal

• Characteristics

• Skin

• Exoskeleton

A _______________ is a quality or trait.

• Internal

• Characteristics

• Skin

• Exoskeleton

This protects the animal body and acts as a barrier against harmful materials.

• Claws

• Fur

• Skin

• Exoskeleton

A structure that receives information about an animal's environment.

• Gills

• Brain

• Skin

• Exoskeleton

These provide oxygen to the blood and take carbon dioxide from the blood.

• Gills

• Brain

• Lungs

• Exoskeleton

A rigid support system that includes bones that connect to the soft structures of the body.

• Skeleton

• Brain

• Lungs

• Exoskeleton

The internal organ that pumps blood.

• Skeleton

• Heart

• Lungs

• Exoskeleton

Organ that are found in fish that extract oxygen from the water as water flows around gills.

• Gills

• Heart

• Lungs

• Exoskeleton