Most likely the outside air but another possible answer would be the brounchus, lungs, windpipe, etc.
your lungs have structures called alveoli. The alveoli are surrounded by capillary beds which carry blood. The oxygen enters the alveoli when you inhale. The oxygen then diffuses from high concentration in your alveoli to low concentration the blood in the capillaries surrounding the alveoli.
probably oxygen
Oxygen enters the blood in the alveoli of the lungs
In the alveoli which is in the lungs
To Filter the blood
Oxygen is removed from the alveoli by the cappillaries.
Carbon dioxide does.
your lungs have structures called alveoli. The alveoli are surrounded by capillary beds which carry blood. The oxygen enters the alveoli when you inhale. The oxygen then diffuses from high concentration in your alveoli to low concentration the blood in the capillaries surrounding the alveoli.
your lungs have structures called alveoli. The alveoli are surrounded by capillary beds which carry blood. The oxygen enters the alveoli when you inhale. The oxygen then diffuses from high concentration in your alveoli to low concentration the blood in the capillaries surrounding the alveoli.
alveoli son..
Partial pressure affects the movement of oxygen from the alveoli to the blood because it is the main driving force for oxygen movement in the lungs.Oxygen passes from the air to the fluid within the alveoli, into the cell of the alveoli.
It diffuses into the blood capillaries surrounding the alveoli.
Alveoli takes oxygen in and brings out carbon dioxide.
i dont noww , alveoli is stupid
Oxygen enters the blood in the alveoli of the lungs
oxygen and carbon dioxide are exchanged in alveoli (singular alveolus).
The humorus