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The cornea gets some oxygen through the water in the eye known as the aqueous humor, all other oxygen is from the environment. That's why it's a big deal that contacts allow oxygen through them to the eye.
the gas cannot be controlled however the oxygen can. Gas is passed through and the valve can be turned to allow more or less oxygen in, the more exposed the gas is to oxygen, the more intense the flame.
produce atp from food
There is no free oxygen in space, so they need to carry oxygen with them to allow their fuel to burn and, in the case of manned spacecraft, for the crew to breathe.
The gas that is required to allow rusting to occur is Oxygen
Capillaries
Capillaries are the thin-walled vessels that allow oxygen and carbon dioxide exchange. Their thin walls make it easy for gases to diffuse across the membranes.
Capillaries - The endometrium (epithelial lining/wall) of the capillaries is only one cell thick optimizing diffusion/osmosis between it and the tissue cells of the body
The alveoli and capillaries in the lungs pass oxygen to the blood. Both have very thin walls, which allow the oxygen to pass from the alveoli to the blood. The capillaries then connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.
respiration, blood vessels allow for oxygen carrying, cilia allow for filter feeding.
Capillaries are known as exchange vessels. Capillaries are the smallest of vessels and allow nutrients and waste to pass through blood and body.
Capillaries are tiny blood vessels that allow your body to pump oxygen all over your body.
Capillaries!
xylem vessels
Strainer
Capillaries
Capillaries