How is blood pumped around the body through the heart?
Blood goes into the atria of the heart and the atria contract and force blood into the ventricles. The ventricles then contract and force the blood out of the heart.
There are valves in the heart which ensure that blood flows in unidirectionally in the right way.
Blood flows away from the heart to the organs through arteries and returns to the heart through veins.
In humans, there is a double circulation system, with 2 separate ones: one for the lungs and one for all other organs of the body.
LW
Related Biology GCSE answers
All answers ▸Describe how water moves from roots to leaves (3 marks)
Describe how animals and plants are adapted to survive in dry conditions such as deserts.
What is the difference between the two main schools of thought on enzyme function?
Explain how the eye responds to different light levels.