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Gas is exchanged by diffusion.
We have followed the path of the air and of the oxygen into the bloodstream. But breathing is a two-way street: we breathe in and then we breathe out. When we breathe in, or inhale, oxygen is removed from the air. Breathing also removes waste from the lungs and from our noses and mouths. How does this waste material get into the air that we breathe out, or exhale?
The thin walls of the alveoli actually have two purposes. When we breathe in, oxygen passes through the walls of the alveoli and into the blood. Carbon dioxide and water vapor then travel the opposite direction. They are the main waste products that pass from the blood vessels (arteries) in the lungs, into the alveoli, through the windpipe and out the nose and mouth.
In the alveoli, oxygen crosses over into the blood stream and carbon dioxide leaves the blood stream and enters the alveoli to be expelled through the lungs.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoAlveoli- these are the small sac-like structures where gas exchange occurs with the blood. Its creates an ideal site for gas exchange between the air in the lungs and the blood in the capillaries.
Wiki User
∙ 13y agoGas exchange works by diffusion. The movement of molecules from a Higher concentration gradient to an area of lower concentration gradient.
Since there is more oxygen in the alveoli than in the capillaries, oxygen diffuses from the alveoli to the capillaries. And since there are more carbon dioxide in the capillaries than in the alveoli, carbon dioxide diffuses from the capillaries to the alveoli.
Wiki User
∙ 9y agoThere are about 170,000,000 alveoli in your lungs. The total estimated surface area is about 1100 square feet. Gaseous exchange occurs through such a large surface area. You have a thin wall of capillary and thin wall of alveolus, that separates the blood and the air. So both come very close to each other, but do not get mixed up. The blood flows very slowly in the capillaries, but the length of capillaries is very less. Within few milliseconds the gaseous exchange takes place by way of diffusion. That is transferred from higher concentration to lower concentration. No energy is required in this process.
Wiki User
∙ 9y agoThe capillaries are very close to the alveoli. Gases move across their boundary in response to the diffusion gradient.
Wiki User
∙ 11y agoYep.
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Where in the respiratory tract does gas exchange occur?
The gas occurs by simple diffusion through the cells.
Where in the respitory tract does gas exchange occur?
In the alveoli
Is gas exchanged in the pleura?
--it is in the alveoli where the exchange of gases occur.. :))
What surrounds the alveoli in the lungs to allow gas exchange to occur?
Capillaries
In which structure does gas exchange occur?
gas exchange occurs between pulmonary capillaries and the alveoli in the lungs.
Where does gas exchange occur?
gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries
Where does gas exchange between the air and the blood occur?
respritory system
Where does gas exchange occur in the human respiratory system?
Gas exchange does not occur in the respiratory tract, it occurs in the alveoli.
Where does the exchange of gases between blood air occur?
Simply put, the gas exchange occurs in the lungs. More specifically, the blood exchange occurs at the avoli, the "air sacs" in the lungs where the surrounding capillaries can be oxygenated.
Where does the actual air exchange take place in the lungs?
The actual air exchange takes place in the alveoli of the lungs
Does gas exchange in the alveoli?
Yep.
What structure makes it possible for oxygen to enter the circulatory system?
The alveoli at the end of bronchioles allow gas exchange to occur.
