Body Systems Part 2

Match it! Select the correct answer from the pull down...Good luck!

Arm muscles are

The expanding and contracting of the lungs is

The difference between voluntary and involuntary muscles is that

The ___________ run throughout the human body and send signals to and from the brain.

The lungs expand and draw in air when the diaphragm

Digestion begins in the mouth. Food is broken down by __________ in the mouth.

Arteries and veins branch out into the smallest blood vessels called

The function of the excretory system is to