This week we start to look at the systems in our bodies that pump our blood, which has the task of carrying things to (and from) the different parts of our body.

The types of circulatory systems available to animals are explained, as is the structure of the heart. You must understand how that structure works so as to act as a pump for your blood.

We also look at possible problems we can experience as a human, linked with the heart and the blood.

Start answering the questions that you can.

If you have time, you can take the pressure off yourself for next week by moving ahead in your Study Guide, into the next part of this Section.