nitrogen, carbon, hydrogen, oxygen, phosphorous, and sulfur
Oxygen and Carbon Dioxide are the two gases being exchanged in the alveoli. Carbon Dioxide diffuses blood into the air, and oxygen diffuses from the air in the alveoli into the blood.
The answer is A!
Ron is showing an invalid experimental placebo in this experiment due to the positive response.
goodluck, :)
Answer:
I think that the answer is c. If not then it is probably d or a.
