What is the pathway of air through respiratory system?

Answer 1

At the back of the nose and throat lies the pharynx. The pharynx is further divided into the nasopharynx, oropharynx and layrngopharynx (aka hypopharynx).

The nasopharynx from the base of the skull to the soft area at the roof of the mouth (soft palate). The sides of the nasopharynx are open and contain the sustachian tubes. Tonsils and adenoid are at the top of the nasopharynx.

The oropharynx connects with the soft palate, travelling to the epiglottis (the valve that stops us from inhaling food, and closes when we drink and eat). The oropharynx communicates with the respiratory and digestive system.

The laynrgopharynx begins at the epiglottis and and extends to the esophagus.

Next comes the larynx, and now we're starting to enter the airways. The larynx connects the upper and lower airways. Then there's the trachea, mainstem bronchi, lobar bronchi, segmental bronchi, and subsegmental bronchi - all divisions within the lungs of the bronchial tubes.

Now things get smaller. Further down are the bronchioles, or small airways. This is were we start to get air. The bronchioles are the source of oxygen delivery.

At the very end, in the terminal bronchioles, air conduction (not exchange) ends.

We're almost there. The respiratory bronchioles are the very beginning of where we exchange air, taking in oxygen and blowing out carbon dioxide
Mouth --> Pharynx --> Larynx --> Trachea --> (LUNGS: Bronchus --> Bronchioles --> Alveoli), then back out.

Answer 2

First it enters through the nose. And then the Pharynx. And then the Larynx. And then the Trachea. And then the Bronchi. And finally the lungs.

Your nose is the primary passageway into and out of the respiratory system

Answer 3

Air comes in through the respiratory tract into the lungs. Gas exchange occurs in the alveoli, oxygenating red blood cells. The blood cells travel through the body, releasing oxygen. CO2 is released by cells and absorbed into the blood stream where it travels back to the lungs and expelled from the lungs.

Answer 4

The air first enters into the nasal cavity (or mouth) then to the pharynx. Air is warmed by the nasal passages. From there, it passes through the trachea, then to the main bronchi (2, plural is bronchi; 1 is bronchus), and begins its descent into numerous bronchioles in the lungs. Within the lungs, the structures look like an upside down tree, wider at the top (the bronchi, which is like a split trunk of a tree), and getting increasingly narrower in the bronchioles (similar to branches on a tree being wider then getting narrower as the branches reach upward on a tree). At the ends of each bronchiole, there are clumps of aveoli which look like a clump of grapes. The aveloi round balls (just one is an aveolus) have a thin membrane which has many small blood vessels over and around each one. Here, the air we breathe passes into the bloodstream as oxygen. At the same time, carbon dioxide is released from the bloodstream to the aveloi, which expel it into the bronchioles, up though the lungs to the main bronchi, up the trachea, and back up to and out either the nose or the mouth.

Answer 5

Pathway of a molecule of Oxygen would take from the external nares to lung:: Pharynx--> Larynx--> Trachea--> Bronchus--> Bronchiole--> Aveolus--> Lung

Answer 6

Pharynx----->Larynx------>Trachea---->Bronchi---->Alveoll