Explain why the contraction times of the atria and ventricles in the heart differ.
The atria have a shorter contraction time as the ventricles as they only need to pump blood into the ventricles. The contraction time of the ventricles is longer as they need to pump blood through the aorta to the whole body.
PK
Related Biology GCSE answers
All answers ▸A plant is moving mineral ions from the soil into its roots by the process of active transport. Does this suggest that the concentration of ions is higher in the soil or the roots?
describe the function and structure of the cardiovascular system
Explain how a mutation in the genetic code leads to a dysfunctional enzyme.
What is the difference between aerobic and anaerobic respiration?