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Alveoli

Alveoli are the small air bags present in lungs that help in gaseous exchange.

450 Questions

How many alveoli are in the lungs?

300 million in each and 600 million in both

Why do alveoli got a very good blood supply?

Of course, the lungs receive a full flow of blood straight from the heart, because the entire blood supply must be oxygenated and have it's carbon dioxide removed continuously. The alveolis' function is to provide a large surface area for the gas exchange to take place. These millions of tiny air sacs have a surface covered in very fine capillaries.Their combined surface area is about the same as a tennis court,co-incidently similar to the surface area in the small intestine.

Does carbon dioxide diffuse from the capillaries to the alveoli?

yes while oxygen then diffuses into the blood, and carbon dioxide diffuses out. it's a chain

Why does the walls of the capillaries and the alveoli have to be thin?

If their walls are too thick, substances like oxygen and nutrients and waste cannot pass across the cells into or out of the body.

What is the function of simple squamous epithelium of the alveoli?

The alveoli is just one cell layer thick so that diffusion of gasses between the capillaries and the alveoli is easy. Simple squamous epithelium are found in the capillary walls and the alveolar walls. They are thin so diffusion is easy.

Which substances are exchanged between the blood in the capillaries and the air in the alveoli?

Oxygen is exchanged from the air in the alveoli into the blood in the capillaries, while carbon dioxide is exchanged from the blood in the capillaries into the air in the alveoli during the process of respiration.

Can a person live on two aveoli?

No, we need many, many alveoli to give the surface area needed for gas exchange.

What does seize mean?

The verb to seize means to grab and hold.

Example:

"I pulled away before he could seize the phone from me."

"The enemy troops prepared to seize the city."

"Moving parts will often seize, or become stuck together, unless lubricated."

Blood goes into lung alveoli?

Blood does not go into the alveoli, that would only result from a hemorrhage. Blood does come close to the alveolar sacs via small capillaries that are there to perform an action called gas exchange. This process occurs as a result of diffusion and releases the carbon dioxide in the red blood cells and is replaced by oxygen to be carried to the body tissues and used in tissue respiration.

What is the more common name for the alveoli?

The Air Sacs or The End of the Bronchioles.

How are the alveoli designed to maximise the exchange of gases?

the paouch like air secs at the smallest lenchioles is called alveoli.the walls of alveoli are very thin and they are sorrounding thin blood capllaries .it is in alveoli exchange of gaseouse takes place there are so many alveoli in blood so they provides very larges surface srea for cxchanges of gaseouse

How do you remove CO2 from the blood?

Carbon dioxide is removed from the blood by the lungs and exhaled when you breath out.

Which is the best description of alveoli?

b) An alveolus (plural: alveoli, from Latin alveolus, "little cavity") is an anatomical structure that has the form of a hollow cavity.[1] Found in the lung parenchyma, the pulmonary alveoli are the dead ends of the respiratory tree, which outcrop from either alveolar sacs oralveolar ducts, which are both sites of gas exchange with the blood as well.[2] Alveoli are particular to mammalian lungs. Different structures are involved in gas exchange in other vertebrates.[3] The alveolar membrane is the gas-exchange surface. The blood brings carbon dioxide from the rest of the body for release into the alveoli, and the oxygen in the alveoli is taken up by the blood in the alveolar blood vessels, to be transported to all the cells in the body.

How do you identify that in the system the neutral is floating or not?

do a continuity test between the neutral and the metal enclosure of the equipment containing the neutral. infinity reading [ open line ] indicates floating neutral. Steve sorensen jr

What type of cells line the alveoli?

Simple Squamous Epithelial Tissue forms the surface of the alveoli

Why not all tidal volume reach alveoli for gaseous exchange?

The amount of air that reaches the alveoli is 150 mls

less than the tidal volume. The reason for this is that this amount remains in an area called "dead space"

What is the detergent-like substance which reduces the surface tension in the lungs?

Surfactant! or 'Pulmonary Surfactant' Just had one of those moments too :)

How is ATP regenerated?

ATP is regenerated from ADP and inorganic phosphate by an enzyme controlled process called phosphorylation.