Year 9 Biology
Respiration
Aerobic and anaerobic respiration, the effects of exercise, oxygen debt and the liver, metabolism, and cardiac output.
What is in this topic
- A narrated lesson video that works through the topic, with worked examples
- 100 practice questions at foundation, core and stretch level
- A worked explanation on every answer, and progress you can come back to
The lesson and practice open when you start the 7-day free trial. Cancel before it ends and you pay nothing.