CAIE IGCSE Biology 9.1.1 Circulatory system as a system
CAIE IGCSE Biology 9.1.1 Circulatory system as a system
Practise describing the circulatory system as blood vessels, a pump and valves that move blood one way around the body.
How this is tested
- match the heart, arteries, veins and valves to their roles in moving blood around the body
- state that valves in the heart and veins prevent backflow and maintain one-way blood flow