Students know how blood circulates through the heart chambers, lungs, and body and how carbon dioxide (CO2) and oxygen (O2) are exchanged in the lungs and tissues.
In diagrams of the heart and the circulatory system, note that the right and left sides of the heart are described from the perspective of the person looking out from their body. Thus, the right side of the heart is shown on the left from the point of view of the reader looking at the diagram.
| 
