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They are structured like they are because the help us to breathe. The reason they have alveoli is because they help us with gas exchange

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Q: Why are lungs divided into small sac like structure?
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What is an alveolate?

An alveole is another word for an alveolus, a small cavity or pit, in the form of an anatomical structure or a small sac of air in the lungs.


What are the bronchi and what do they do?

bronchi is a tube like structure. It carries air to lungs.


How does the bronchi and what is its job?

bronchi is tube like structure. It carries air to lungs.


What are the small air sacs in the lungs?

These small sac like structure are known as the alveoli . The alveoli help in the exchange of the gases, oxygen & carbon-dioxide,Lungs contain alveoli to increase the surface area and to easily transport oxygen to the blood vessels which surrounds the air sacs. Also, the air sacs have a thin film of oxygen which helps to absorb oxygen quickly.


What do the lungs look like across a cut edge?

On a cut edge the lungs look like they have small holes in them but these are bronchi which are held open by cartilage. Bronchi carry Oxygen into the lungs from the Larynx.


Why are the ribs called rib cage?

Because collectively they enclose the heart and lungs in a cage like structure.


Structure in the lung through which oxygen moves from the air into the blood?

a artery actually move the blood to your lung but th perodic vane helps like a police officer to stop and move the blood


The space between the lungs is called the?

Each lung is surrounded by pleura, sac-like structures which prevent the lungs over-expanding and reduce friction between lungs during their expansion. They contain a small amount of pleural effusion (fluid) which keeps the lungs moist acting as a lubricant. Each pleura is made of two layers, parietal and visceral. The visceral membrane is continuous with the lungs and the parietal is on top of that (with the pleural fluid/effusion between).Between the two lungs is a structure called the mediastinum, this is another sac-like structure which contains the pericardium (heart-sac), the heart, the major vessels leaving the heart, some of the oesophagus and trachea also enter it.


What are small sac-like structures that is the site of gas exchange in the lungs?

"alveoli"


The exchange of oxygen and carbon dioxide occurs where in the lungs?

The alveoli is the structure of the lungs where the exchange of carbon dioxide and oxygen occur. The alveoli are like tiny sacs of air.


Where is alveoli found?

Alveoli are little air sacs found in bunches (like grapes) at the end of terminal bronchioles. Alveoli are where gas exchange (oxygen goes into blood and carbon dioxide out of blood) happens as they have sufficiently thin walls and suitably large total surface areas for gas exchange to occur.


What is the small dot-like structure inside the nucleus?

Nucleolus.