Skeletal System
These structures, also part of the skeletal system, crush what has entered the mouth.
What are the teeth?
A disease in the lungs caused by breathing in harmful chemicals.
What isemphysema (or lung cancer)?
The connection between the shoulder and hip in humans is this kind of joint.
What is a ball and socket joint?
This chemical is in the air we breathe and we need it to survive.
What is oxygen?
Small sacks in the lungs which allow oxygen and carbon dioxide to move between the lungs and blood stream.
What is alveoli?