ANAT 216 Lecture Notes - Lecture 3: Nasal Cavity, Soft Palate, Lamina Propria
28 Apr 2018
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ANAT 215 week 2 lecture 1
Respiratory sys
Function
Supply O2, eliminate CO2
Conducting portion: channel for air mvmt, filters, humidifies and warms air
Resp portion: gas exchange, start in resp bronchioles
RTE: Conditions air, ciliated pseudostrat columnar (act as cilia) + goblet (secrete mucous
and condition air) + basal cells (DN extend to lumen, stem cell prod for epithelium)
Nasal cavity
Primary air passageway
Midline septa divides cavity, part cartilage and part bone (ethmoid)
Palate: floor, sep nasal and oral cavity
Roof= frontal, ethmoid, sphenoid bones. Floor= soft (skeletal muscle) and hard palate
(bone) lateral walls= maxillary and nasal bones
Vestibule: just inside opening of nostrils, space enclosed by movable part of nose,
contain short thick hairs to filter out part matter
Nasal fossae: covered w ciliated RTE that filter out noxious gases and sweep
contaminated mucous to throat to be digested, cilia DN work well in cold
Superior, middle and inferior conchae: increase SA of RTE exposed to air, cause air
turbulence due to scroll shape, bony shelf-like projections w groove beneath (meatus)
Superior have sensory Rs for smell instead of Goblet cells
Mucous and serous glands moisten air while air absorbs residual heat from blood vessels
in lamina propria
Paranasal
sinuses
Surround nasal cavity, lined w RTE, cold makes RTE enflame=smaller passageway,
mucous and P build up=headache
Located in frontal, sphenoid, ethmoid and maxillary bones
Pharynx
13cm throat, connects nasal cavity to larynx + esophagus, skeletal muscle
Naso: lies behind and cont w nasal cavity, b/n sphenoid and soft palate, lined w RT, contains p
auditory tube openings
Oro: cont w oral cavity, b/n soft palate and epiglottis, food and air passage, strat squamous ep
damage w swallowing
Laryngo: lies behind epiglottis and down to larynx, where resp and digestive sys diverge
Larynx
Voice box, passage for air in lungs, sep food from air and prod sound, smooth muscle
changes from strat squamouspseudo columnar here
Mucosal folds: vibrate w air flow, tension=pitch (thicker+lonegr in males)
- False: vestibular lig, DN vibrate but protect true
- True: vocal lig under epithelium forming core mucosal folds, vibrate to prod
sound
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Document Summary
Conducting portion: channel for air mvmt, filters, humidifies and warms air. Resp portion: gas exchange, start in resp bronchioles. Rte: conditions air, ciliated pseudostrat columnar (act as cilia) + goblet (secrete mucous and condition air) + basal cells (dn extend to lumen, stem cell prod for epithelium) Midline septa divides cavity, part cartilage and part bone (ethmoid) Floor= soft (skeletal muscle) and hard palate (bone) lateral walls= maxillary and nasal bones. Vestibule: just inside opening of nostrils, space enclosed by movable part of nose, contain short thick hairs to filter out part matter. Nasal fossae: covered w ciliated rte that filter out noxious gases and sweep contaminated mucous to throat to be digested, cilia dn work well in cold. Superior, middle and inferior conchae: increase sa of rte exposed to air, cause air turbulence due to scroll shape, bony shelf-like projections w groove beneath (meatus) Superior have sensory rs for smell instead of goblet cells.
