What is the gas exchange surface in humans called?
Answers:
It occurs through squamous epithelium in the aveoli in the lungs
The lung is the essential respiration organ in air-breathing vertebrates. Its principal function is to transport oxygen from the atmosphere into the bloodstream, and to excrete carbon dioxide from the bloodstream into the atmosphere. This exchange of gasses is accomplished in the mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs called alveoli. Lungs also have nonrespiratory functions.
Gas exchange takes place in the alveoli, sometimes called the respiratory membrane.
The alveoli work on the principle of osmosis, where something goes from a higher gradient to a lower gradient, until the pressures on each side of the membrane are equal. In other works oxygen goes from a high concentration in the bronchi into the blood and the reverse is true for carbon dioxide
The alveoli
alveoli in the lungs?
As per other answers but trhe process is diffusion not osmisis. Osmosis is the movement of water across an concentration gradient.
Diffusion is the movement of any molecules across a concentration gradient.
Also the squamous epithelium is on the air side if the membrane, there are endothelial cells lining the blood side of it.
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