Answer:
Ping pong, or table tennis, is played on a 5' by 9' surface.
Answer is D. Because the chemoreceptors located in the carotid and aortic bodies monitor the concentration of carbon dioxide and oxygen in the arterial blood.
The answer is D because of smoking and the smoke fills places and the smoke is dangerous to breathe in. If you are younger than 18 and are using drungs it is against the law to do that. Finnally they increase spread of disease because you could have too much drugs.
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alisa202
Resistance because how long u last running depends on ur breathing issue
The answer would be D. Frequent infections.
