BSCI 202 Lecture Notes - Lecture 3: Blunt Trauma, Bronchiole, Cribriform Plate

• School: University of Maryland
• Department: Biological Sciences Program
• Course: BSCI 202
• Professor: Obrien

Document Summary

Air passageway, 150 ml volume = dead space volume. Humidify air: need moisture for optimal gas exchange in the lungs. Contains: goblet cells secret mucus, ciliated cells cilia move particles toward mouth to be expelled, respiratory zone: site of gas exchange, includes the respiratory bronchioles, alveolar ducts, alveolar sacs, alveoli, structures. The rest of the cavity is lined with respiratory mucosa that: moisten air trap incoming foreign particles. Lateral walls have projections called conchae increase surface area increase air turbulence within the nasal cavity: particles can get trapped in nose hairs, come in contact with olfactory. Cavities within bones surrounding the nasal cavity are called sinuses. Function of the sinuses lighten the skull: provides more structural integrity, act as resonance chambers for speech, hear your self talk, produce mucus that drains into the nasal cavity. Sinuses are located in the following bones: frontal bone, sphenoid bone, ethmoid bone, maxillary bone, pharynx, muscular passage from nasal cavity to larynx, regions.