Circulatory system
Heart
A muscular organ that pumps blood around the whole body without stopping.

What it does
- Pumps blood through the systemic and pulmonary circulation
- Delivers oxygen and nutrients to the tissues
- Helps remove carbon dioxide and waste products
Where it is
In the chest, between the lungs, slightly to the left of the midline of the body.
Did you know?
An adult heart beats about 100,000 times a day and pumps about 7,000 litres of blood in that time.















