Anatomy

In the respirartory system, the air travels into the oral and nasal cavities. In the nasal cavity there are conchea and meatus. Continuing from the nasal cavity to the larynx and trachea, there is the nasopharynx, oropharynx, and laryngealpharynx. The larynx is protected by thyroid cartiage and the trachea is protected by cricoid cartilage. From there the air enters the primary bronchi. The primary bronchi split off into secondary brochi, and the secondary bronchi split off into tertiary brochi. The tertiary bronchi break off into brochioles, where there are aveoli sacs. Oxygen and carbon dioxide exchange into and out of the blood occur here.