CAPS 390 Lecture Notes - Lecture 26: Lamina Propria, Respiratory Epithelium, Genitourinary System
18 Nov 2015
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Reading: chapter 15, pp 345- 353. Conductive portion of the respiratory tract. Lecture 26 respiratory i, november 3rd, 2014 (dr. roskelley) Conducts air in/out of the lungs. Exchange of o2 and co2 in lungs (respiration) Begins at nasal cavity and ends in the terminal bronchioles within the lungs. Major conducting airway in neck and thorax. Lamina propria : loose ct + malt; elastic lamina (for recoil) at interface of mucosa and submucosa. Dense fibroelastic ct; seromucous glands: exocrine; complex acinar. Contains hyaline cartilage rings (c- shaped) with smooth muscle that connects the ends of c posteriorly. ____________________________: basal (stem) cells, submucosa (middle layer, adventitia (outer layer) Common air and food passage, funnel- shaped with muscular (ie. not cartilaginous) walls. Epithelium: mostly lined by some respiratory epithelium and considerable stratified squamous epithelium due to friction of food bolus passing through. Lamina propria: contains large m. a. l. t aggregates (eg. pharyngeal "tonsils") Submucosa: contains seromucous glands whose ducts empty onto lumenal surface.
