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The respiratory systemSections of the larynx, trachea and
lung
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Mediansaggital section of the larynx
1.
2.
3.
5.
4.
6.
7.
vestibule
ventricule
subepiglottic
cavity
4.
1. epiglottic cartilage2. thyroid cartilage3. arch of cricoid cartilage4. cartilages of trachea5. lamina of cricoid cartilage6. vestibular fold7. vocal fold
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Hyaline cartilage:Thyroid cartilage
Cricoid cartilage
Arytenoid cartilage except the vocal processElastic cartilage:
Vocal process of arytenoid cartilage
Corniculate cartilage
Cuneiform cartilageEpiglottic cartilage
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Epiglottis
stratified squamous nonkeratinized epitheliumwith high papillae on the pharyngeal surface
stratified nonkeratinized squamous epitheliumwithout papillae on the laryngeal surface
Larynx
ciliated pseudostratified columnar epithelium
Vocal foldstratified squamous nonkeratinized epithelium
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51. larynx-epiglottis (HE), 4X
laryngeal surface
pharyngeal surface
elastic cartilagesalivaryglands
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Vestibular foldVocal fold
Ventricule
51. larynx (HE), 4X
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Identification of the surfaces of epiglottis
Determination of vestibular and vocal foldsRecognition of covering epithelia
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1.Tunica mucosa:
a, epithelium mucosae: ciliated pseudostratified columnarepithelium, goblet cells, endocrine cells
b, lamina propria: loose connective tissue,lymphocytes, plasma cells
2. Tunica submucosa: loose connective tissuetracheal glands sero-mucous glands
3. Tunica fibro-musculo-cartilaginea: hyaline cartilage rings
annular ligg.
paries membranaceus
(trachealis muscle,connective tisue)
4. T. adventitia: connective fibers, blood vessels, nerves
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52. trachea (HE), 4X
ciliated pseudostratifiedcolumnar epithelium
trachealglands
hyalinecartilage
paries
membranaceus
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52. trachea (HE), 40X
basal lamina
ciliated pseudostratifiedcolumnar epithelium
capillarylamina propria
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Find the characteristic items of thetracheal wall.
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1. T. mucosa: - ciliated pseudostratified columnar epithelium- epithelium gradually decreases in its height,lamina propria becomes thinner towards theterminal bronchioli
2. T. muscularis: smooth muscle layer in the larger bronchiis replaced by spirally arrenged smoothmuscle cells in the smaller bronchi
3. Cartilage plates: decrease gradually in number and size
4. Adventitia: collagen fibers.
In the wall of the bronchi small salivary glands can be found.
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53. lung- bronchus (HE), 10X
hyalinecartilage
smoothmuscle
alveolus
bronchiallumen
epithelium
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53. lung- bronchiole(HE), 10X
lumen ofbronchiole
epithelium
alveoli
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53. lung (HE), 40X
alveolus
septum
pneumocyte II
pneumocyte I
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Differentiate between the walls of bronchiand bronchioli.
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The layers of the blood-air barrier
type I cell
surfactant
capillary endothel
fused basal lamina
capillarylumen
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54. lung (orcein), 40X
elasticfibers
pneumocyte II
pneumocyte I
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Study the thin walls of alveoli.
Try to find pneumocyta II cells.