Question

_______ This moves into the blood from the lungs?

Answer 1

Oxygen gas

Explanation:

Oxygen `(O_2)` moves into the blood from the lungs via diffusion. Diffusion is the net movement of particles from a higher level of concentration to a lower level of concentration.

Since the oxygen-rich alveoli contains a lot of oxygen, the oxygen will move down into the blood stream through diffusion to maintain a chemical equilibrium between the two concentrations.

Source:

http://reptools.rutgers.edu/1Functpage11.html