Internal & External Structures and Functions of Animas

a rigid inner support system in vertebrates made of bones

what animals that live in the water use to breathe

the internal organ that pumps blood

a hard external covering on many invertebrates that maintains their shape and protects their soft body

an organ that receives information about the environment and tells the body how to react

an organ that surrounds and protects the body and acts like a barrier against harmful materials

what animals that live on land use to breathe

the sharp, point structures on the feet of some animals; used for capturing, carrying, and tearing apart prey

Figures out the meaning of

a rough covering that protects and insulates the body

a quality or trait

a thick covering that keeps animals warm

protect against temperature changes and enable most birds to fly