Question Constellation Sign up for free AQA · GCSE · Biology · Higher
Chest Compressions and Oxygen Delivery
A person’s heart stops beating. The person stops breathing. A first-aider pushes down on the person’s chest. Pushing down on the person’s chest puts pressure on the heart.
Explain why putting pressure on the heart helps the person.
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 States that chest pressure pushes or moves blood.
- 2 Links that blood movement to carrying oxygen around the body or to an organ.
Full-mark answer
Putting pressure on the heart pushes blood through the blood vessels, so oxygen is carried around the body to its organs.
Why this answer loses marks
The pressure restarts the heart.
Restarting the heart is not the credited explanation; link pressure to moving blood and oxygen delivery.