What are stem cells? Where are they found?
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The respiratory structures in order that air moves from outside to inside include primary bronchus--> secondary bronchus--> Tertiary bronchus--> terminal bronchioles--> respiratory bronchioles--> alveolar duct--> alveolar sacs--> alveoli.
<h3>What is respiratory system?</h3>The respiratory system is one of the major systems of the body that helps in the oxygenation of the blood which is used by the body cells for oxidation.
Respiration occurs as we breath in air or oxygen and breath out carbon dioxide as used air from the body.
The correct flow of this air from outside to the inside of the body through the following order:
The primary bronchus: This is the first division of from the trachea at the carina forming two bronchi which leads to the left and right lungs.
The secondary bronchus: This divides form the primary bronchus.
The tertiary bronchus: This divides from the secondary bronchus to to supply each segment of the lungs.
The terminal bronchioles: This divides from the tertiary bronchus
The respiratory bronchioles: This divides for the terminal bronchioles.
The alveolar duct, alveolar sacs and alveoli is the main area that oxygen is exchanged with the blood.
primary bronchus--> secondary bronchus--> Tertiary bronchus--> terminal bronchioles--> respiratory bronchioles--> alveolar duct--> alveolar sacs--> alveoli.
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