To give something and get something back
Exchange
A group of parts that work together
System
To take air into your lungs
Inhale (Breathe In)
To push air out of your lungs
Exhale (Breathe Out)
Two organs in the chest that help us breathe
Lungs
Tiny cells in the blood that carry oxygen around the body
Red Blood Cells
The bones around your chest that protect the lungs and heart
Rib Cage
To take air into your lungs and let it out again
Breathe
The passage inside the neck that air and food go through
Throat
Meaning “inside”
in-
Meaning “out”
ex-
