3 The heart, blood and the lungs

We will now concentrate on the heart, the engine of the body. We will also consider the related topics of blood and blood flow, and the role of the lungs and oxygen in the body.

We all know that the heart is very important but what exactly does the heart do? Why is the blood so important? What functions do the lungs perform? In the next sections, we will try to provide at least a basic understanding so we can answer these questions and begin to understand why knowing about the heart is important for all sports people.

Don't forget to make notes as you go, as some of these activities are related to this learning skill.