Anatomy and Cell Biology 2221 Lecture Notes - Lecture 24: Nosebleed, Vomer, Pharynx
30 Jul 2020
School
Department
Professor
Document Summary
Respiratory & digestive system respiratory is outpocket of digestive: share common opening: pharynx, nose, mouth. Conducting zone: respiratory path from outside to respiratory surface. Function: house smell (olfaction) filter, warms air, mucus traps bac, serves as resonance chamber. Kiesselbach"s area: anastomosis of several blood vessels on nasal septum. Epistaxis (nose bleed): trauma, dryness mild( tear vein), major (tear artery) Chonchae: swirls air, increase sa to contact mucosa: superior nasal concha (part of ethmoid) lined by olfactory epithelium, middle nasal concha (part of ethmoid, inferior nasal concha. Nasal cavity connects with: paranasal sinsus, eye duct, oral cavity, ears: middle ear (maintain pressure) Air filled space w/in maxillary, frontal, ethmoid and sphenoid bones lined with respiratory mucosa, produce mucus that drain into nasal cavity. Sinusitis: inflame of paranasal sinus leads to nasal congestion, runny nose. Pharynx: nasopharynx: posterior to chonae/nasal cavity, oropharynx: posterior to oral cavity, laryngopharynx: posterior to larynx. Larynx: upper windpipe : keeps food out respiratory, serves as voicebox.
