histology of respiratory system larynx trache and lung
TRANSCRIPT
The respiratory systemSections of the larynx, trachea and
lung
Mediansaggital section of the larynx
1.
2.
3.
5.
4.
6.
7.
vestibule
ventricule
subepiglotticcavity
4.
1. epiglottic cartilage2. thyroid cartilage3. arch of cricoid cartilage4. cartilages of trachea5. lamina of cricoid cartilage6. vestibular fold7. vocal fold
Hyaline cartilage:Thyroid cartilageCricoid cartilageArytenoid cartilage except the vocal process
Elastic cartilage:Vocal process of arytenoid cartilageCorniculate cartilageCuneiform cartilageEpiglottic cartilage
Epiglottisstratified squamous nonkeratinized epithelium
with high papillae on the pharyngeal surfacestratified nonkeratinized squamous epithelium
without papillae on the laryngeal surfaceLarynx
ciliated pseudostratified columnar epitheliumVocal fold
stratified squamous nonkeratinized epithelium
51. larynx-epiglottis (HE), 4X
laryngeal surface
pharyngeal surface
elastic cartilage
salivaryglands
Vestibular foldVocal fold
Ventricule
51. larynx (HE), 4X
Identification of the surfaces of epiglottisDetermination of vestibular and vocal foldsRecognition of covering epithelia
1.Tunica mucosa:a, epithelium mucosae: ciliated pseudostratified columnar
epithelium, goblet cells, endocrine cellsb, 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 ringsannular ligg.paries membranaceus(trachealis muscle, connective tisue)
4. T. adventitia: connective fibers, blood vessels, nerves
52. trachea (HE), 4X
ciliated pseudostratifiedcolumnar epithelium
trachealglands
hyalinecartilage
pariesmembranaceus
52. trachea (HE), 40X
basal lamina
ciliated pseudostratifiedcolumnar epithelium
capillarylamina propria
Find the characteristic items of thetracheal wall.
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.
53. lung- bronchus (HE), 10X
hyalinecartilage
smoothmuscle
alveolus
bronchiallumen
epithelium
53. lung- bronchiole(HE), 10X
lumen ofbronchiole
epithelium
alveoli
53. lung (HE), 40X
alveolus
septum
pneumocyte II
pneumocyte I
Differentiate between the walls of bronchi and bronchioli.
The layers of the blood-air barrier
type I cell
surfactant
capillary endothel
fused basal lamina
capillarylumen
54. lung (orcein), 40X
elasticfibers
pneumocyte II
pneumocyte I
Study the thin walls of alveoli.
Try to find pneumocyta II cells.