Bloods vessels i think and veins
*will need much more detail than that, thanks!
Yes, capillaries form a network around the alveoli. It is through the alveolar walls and into the capillaries that oxygen enters the blood stream. Carbon dioxide leaves the blood by the reverse route.
Oxygen enters the blood stream through the air sacs in you lungs.
In air breathing animals, oxygen enters the blood stream through the alveoli, tiny sacs in the lungs. In water breathing animals oxygen enters the blood stream through the gills.
The red blood cells pick it up from the air and take it through the blood stream to the cells in the body.
Oxygen reaches all parts of an animal's body when it inhales via the lungs, and the oxygen enters the blood stream. The heart then pumps these oxygenated blood cells to the rest of the body.
Oxygen is transported through the blood stream by Hemoglobin.
Blood picks up oxygen and releases carbon dioxide in the lungs.
Oxygen goes from the lungs to the tissues via the blood stream and CO2 goes back to the lungs via the blood stream
oxygen
Blood cells carry the oxygen through the blood stream to the other cells in the body.
When you breathe it in the oxygen runs around your body and passes through the walls into your blood stream
To carry oxygen and carbon dioxide through the blood stream.