All the cells in your body require oxygen. Without it, they couldn't move, build, reproduce, and turn food into energy.
Processes of Life Standard SC.F.1.2.1: knows that the human body is made of systems with structures and functions that are related. STARS Teacher Workshop.
The Respiratory System. Why do you need to breathe? All the cells in your body require oxygen. Without it, they couldn't move, build, reproduce, and turn.
STARS Teacher Workshop
The Circulatory System. What is the Circulatory System? It's a big name for one of the most important systems in the body. Made up of the heart, blood.
