Respiratory histology
Terms
undefined, object
copy deck
- conducting portion
-
- airways that deliver air to the lungs
- warm, moisten and filter air
1) nose
2) nasopharynx
3) larynx
4) trachea
5) bronchi
6) bronchi
7) bronchioles
8) terminal bronchioles - respiratory portion
- location within the lung where O2 in inspired air is exchanged for CO2 in blood.
- nares
-
- nostrils
- outer portions lined by thin skin - vestibule
-
- epithelium becomes non-keratinized
- posteriorly lining changes to respiratory epithelium
- pseudostratified columnar epithelium with goblet cells
- vibrissae ( thick short hairs) filter large particles form inspired air
- vascular lamina propria with seromucous glands - olfactory epithelium
-
- roof of nasal cavity, on either side of nasal septum on superior nasal conchae
- tall pseudostrtified columnar epithelium
- olfactory cells
- sustentacular cells
- basal cells
- lamina propia: veins, unmyelinated nerves, bowman glands - olfactory cells
- - bipolar nerve cells with bulbous apical projection (olfactory vesicle) with extensions of modified cilia
- olfactory cilia (olfactory hairs)
-
- long non-motile cilia extend over the surface of the olfactory epithelium
- proximal 1/3: 9 + 2 axoneme pattern
- distal 2/3 = 9 perpheral singlet mt srrounding a central pr. of mt
- odor receptors - Supporting (sustentacular) cells
-
- most apically located nuclei of the 3 cell types
- microvilli and prominent terminal web of filaments - basal cells
-
- rest on basal lamina do not extend to the surface
- from an incomplete layer of cells
- regenerative for all 3 cell types - Bowman's glands
-
- thin watery secretion
- odorous substances dissolve
- flushes epithelial surface - nasopharynx
- -