They observe it, run tests on many different things, and do expirments
The answer is alveoli, there the only structures.
Hope this helps! Have a BLESSED day! :-)
In the simulation, neon and argon have particles that are single atoms. On the other hand, each particle of oxygen is made of two atoms of the same kind. Hope this helps
C Pollutant just like emissions or oil spills
Answer:
remove waste and other harmful substances from the body
Explanation:
