1What is a heartbeat? Why does it change?
2What is the pulse? Why are heart rate and pulse rate used to mean the same thing?
3One person's resting heart rate is 112 beats per minute and another's is 50 beats per minute. What are these conditions called?
4Why do arteries have thick, muscular walls? Why do they not need valves?
5Why do veins have valves at frequent intervals?
6What is the function of capillaries?
7Write three differences between arteries and veins.
8Describe systemic blood circulation.
9Describe pulmonary blood circulation.
10The pulmonary artery carries impure blood. Why is it still called an artery?