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Trace the route of air from the nares to an alveolus?

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Answered 2011-03-14 16:55:29

During breathing air enters the nose by passing through the external nares( nostrils)=> pharynx=>larynx=> trachea=> The trachea (windpipe) divides into two main bronchi (also mainstem bronchi), the left main bronchus and right main bronchus. The right main bronchus subdivides into three lobar bronchi while the left main bronchus divides into two. The lobar bronchi divide into => tertiary bronchi, also known as segmental bronchi, each of which supplies a => bronchopulmonary segment. A bronchopulmonary segment is a division of a lung that is separated from the rest of the lung by a connective tissue septum.. There are ten segments per lung, but due to anatomic development, several segmental bronchi in the left lung fuse, giving rise to eight. The segmental bronchi divide into many => primary bronchioles which divide into =>terminal bronchioles, each of which then gives rise to several => respiratory bronchioles, which go on to divide into 2 to 11 => alveolar ducts. There are 5 or 6 =>alveolar sacs associated with each alveolar duct. The alveolus is the basic anatomical unit of gas exchange in the lung.

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What is the plural of alveolus?

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Where is the alveolus found?

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What fills the space inside an alveolus?


What is smallest of the air sacs in the lungs?


What passes from the air inside the alveolus into the blood?


What passes from the air inside the alveolus into the blood.?


What is the real name for air sacs?

Pulmonary alveolus .

What is another word for air sac?

another word for air sac is alveolus.

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.

What is external nares?

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What are the air sacks in the lungs called?

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