Anatomy Essay

575 Words3 Pages
Alyssa McMahan Air goes in at the nose its two nostrils are openings through which air can enter or leave the nasal cavity. Many internal hairs guard the nostrils to prevent entry of large particles in the air. The air molecule then goes in the nasal conchae which are bone and bone processes that are curled out from the lateral walls of the nasal cavity. They increase the surface area of these cavities thus providing for rapid warming and humidification of air. The air molecule then passes through the pharynx the chamber behind the nasal cavity, oral cavity and the larynx. The pharynx is a passage way for air or food to pass through and are ringed by tonsils that trap and kill bacteria that come close to them. The air then goes to the larynx also known as the voice box, is a short section of the airway that connects the laryngopharynx and the trachea. The larynx is located in the anterior portion of the neck, just inferior to the hyoid bone and superior to the trachea. Several cartilage structures make up the larynx and give it its structure. The epiglottis is one of the cartilage pieces of the larynx and serves as the cover of the larynx during swallowing. The epiglottis is a flap of elastic cartilage that acts as a switch between the trachea and the esophagus. Because the pharynx is also used to swallow food, the epiglottis ensures that air passes into the trachea by covering the opening to the esophagus. During the process of swallowing, the epiglottis moves to cover the trachea to ensure that food enters the esophagus and to prevent choking. The air molecule then travels to the bronchi and bronchioles. at the inferior end of the trachea, the airway splits into left and right branches known as the primary bronchi. The left and right bronchi run into each lung before branching off into smaller secondary bronchi. The secondary bronchi carry air into the lobes of

More about Anatomy Essay

Open Document