Oxygen
Some students discuss their ideas about how oxygen moves around the human body.
Ali
Air tubes carry oxygen from the lungs to the heart, where it mixes with the blood.
Jacob
I think air diffuses from the lungs into the blood.
Naomi
Oxygen diffuses from the air in the lungs into blood in blood vessels.
Chloe
I think oxygen mixes with the blood in the lungs.
Grace
Oxygen diffuses through the body from the air in the lungs.
Who gives the best explanation of how oxygen moves around the human body?