I guess that is:
Within the capillaries of the lungs, gases are exchanged by diffusion; O2 diffuses from the alveolus to the bloodstream and CO2 diffuses from the bloodstream to the alveolus.
Answer:
regional metamorphism is a metamorphism that is affecting rocks over an extensive area as a result of the large-scale action of heat and pressure.
Hope it helps if earned brainiest is appreciated :)
We need to see the bar magnet
Answer:
A. phagocytosis and marker protein
Explanation: