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Why does oxygen diffuse from an alveolus to the blood around it?
Oxygen diffuses from an alveolus to the blood around it because of the concentration gradient between the high oxygen concentration in the alveolus and the lower oxygen concentration in the blood. This process allows oxygen to move from the lungs into the bloodstream for transport to the body's cells.
What substance diffuses from an alveolus into a capillary?
Oxygen.
What makes the concentration of oxygen low in the alveolus?
The concentration of oxygen in the alveolus is low because it is continuously being taken up by the blood in the pulmonary capillaries for oxygenation. As a result, the oxygen level in the alveolus decreases, creating a concentration gradient that promotes the diffusion of oxygen into the bloodstream.
What happens to oxygen and carbon dioxide in the alveolus?
In the alveolus, oxygen diffuses from the alveolar air sacs into the bloodstream through capillaries, where it binds to hemoglobin in red blood cells for transport to tissues. At the same time, carbon dioxide diffuses from the bloodstream into the alveoli to be exhaled out of the body during respiration.
Why is the distance between the air in an alveolus and the blood in an alveolar capillary is less than 11000th of a millimetre?
Around the lungs,the blood is separated from the air inside each alveolus by only two cell layers; the cells making up the wall of the alveolus and the capillary wall itself. This is a distance of less than a thousandth of a millimetre. Because the air in the alveolus has a higer concentration of oxygen than the blood entering the capillary network, oxygen diffuses from the air across the wall of the alveolus and into the blood. That is why the distance is important.
Which way does oxygen diffuse when the concentrationof oxygen in the alveolus is higher than theblood capilliary?
Oxygen diffuses from the alveolus into the blood capillary due to the concentration gradient - from high to low concentration. This process allows oxygen to enter the bloodstream and be transported to the body's tissues for utilization.
Why are there large numbers of blood vessels around each alveolus?
because lots of oxygen needs to travel around
Oxygen diffuses into the capillaries of the lungs because there is?
It diffuses because the concentration of oxygen in the capillaries is lower than the concentration of oxygen in the air (law of diffusion).
Where does the air terminate in the respiratory system?
Probably in the tiny "balloons" called alveoli (singular, alveolus). Each has its walls filled with capillaries that bring in blood rich in carbon dioxide/low in oxygen. The carbon dioxide diffuses into the alveoli (then exhaled) while the oxygen just inhaled diffuses from each alveolus into the capillaries and is carried throughout the body. The heart pumps the blood constantly and permits this exchange in the lungs.
Why are there a large number of blood vessels around each alveolus?
because the oxygen needs to pass through alveoli and there is alot of cells around to be transported!!
What passes from the air inside the aveolus into the blood?
Oxygen passes from the air inside the alveolus into the blood through the process of diffusion. This allows oxygen to be transported by red blood cells throughout the body to support cellular respiration.
How do the lungs interact with the circulatory system even though they are considered part of the respiratory system?
The purpose of the lungs is to get oxygen into the body and carbon dioxide out of it. It does this by having a generous supply of blood capillaries surrounding each alveolus. When fresh air is drawn into the alveolus oxygen diffuses through into the capillaries and carbon dioxide diffuses the other way. The capillaries are constantly supplied with de-oxygenated blood from the body and the oxygenated blood travels away to the heart and round the body.
