Answer:
1-it means "with oxygen"its activities that moves muscles and gets you breathing
2-180 over 80 is normal
3-relating to the phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries
4-relating to the phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
5-overheating you can be short on breath bloody nose and etc
Explanation:
