BIOM 2000 Chapter Notes - Chapter 6: Intrapleural Pressure, Nasal Septum, Paranasal Sinuses

• School: University of Guelph
• Department: Biomedical Sciences
• Course: BIOM 2000
• Professor: Carol Armstrong

Document Summary

The nasal cavity, the chamber within the nose, is divided medially by a nasal septum and separated from the oral cavity by the palate. The nasal cavity is lined with a mucosa, which warms filters and moistens incoming air. The mucosa also contains receptors for sense of smell. Paranasal sinuses and nasolacrimal ducts drain into the nasal cavity. The pharynx (throat) is a mucosa-lined muscular tube with 3 regions- nasopharynx, oropharynx and laryngopharynx. The nasopharynx functions in respiration only; the others serve both respiratory and digestive functions. The pharynx contains tonsils, which act as part of the body"s defense system. The larynx (voice box)is a cartilaginous structure; most prominent in the thyroid cartilage (adam"s apple). The larynx connects the pharynx with the trachea below. The laryngeal opening (glottis) is hooded by the epiglottis, which prevents entry of food or drink into respiratory passages when swallowing. The larynx contains the vocal folds (true vocal cords), which produce sounds used in speech.