Unit 12 Get Ready, OD 4

a group of things or parts that work together

the beating of your heart that you feel in different parts of your body, especially in your wrist

the red liquid inside your body

a gas that has no color or smell that people and animals breathe out

the part of the body that makes the blood go around inside

the muscle between your lungs and your stomach that helps you to breathe

the tubes in your body that carry blood away from your heart to other parts of your body

the tube in your throat that carries air to the lungs

the small tubes in your body that carry blood to the heart

the two parts inside your body that you use for breathing