![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Extrapulmonary passages
The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)
![Nasal cavities <p>The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.O.01.P01.png)
Nasal cavities
The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)
![Pharynx <p>The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.O.01.P02.png)
Pharynx
The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)
![Larynx <p>The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.O.01.P03.png)
Larynx
The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)
![Trachea <p>The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.O.01.P04.png)
Trachea
The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)
![Primary bronchi <p>The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.O.01.P05.png)
Primary bronchi
The extrapulmonary passageways include the nasal cavity, pharynx, larynx, trachea and primary bronchi. (Images of the pharynx are not included in this program.)