7th Grade Chapter 12

Which process helps oxygen move from the outside to the inside of cells?

• absorption

• diffusion

• circulation

• undulation

Aquatic Animals use ________ to obtain oxygen from their new environment.

• lungs

• spiracles

• fins

• gills

A(n) _____________________ is a system that transports blood and other fluids into open spaces that surround organs in the body.

• open circulatory system

• closed circulatory system

A(n) _______________ is a system that transports materials through blood using vessels.

• open circulatory system

• closed circulatory system

What helps blood move through the blood vessels? They contract and push blood through.

• water

• muscles

• fingers

• gills

Animals have different types of _______________, depending on what kinds of food they eat.

• hearts

• feet

• tongues

• teeth

____________ is the process in which nutrients from digested food are takin into the body.

• digestion

• absorption

• diffusion

• excretion

We breath in _________________ and breath out ____________.

• helium, carbon dioxide

• oxygen, helium

• oxygen, hydrogen

• oxygen, carbon dioxide

During ____________ waste materials are removed from the body.

• absorption

• digestion

• excretion

The type of waste an animal excretes depends on its

• enviornment

• teeth

• weather

• feet