Histology of respiratory system larynx trache and lungPresentation Transcript
The respiratory systemSections of the larynx, trachea and lung
Mediansaggital section of the larynx 1. vestibule 1. epiglottic cartilage 6. 2. thyroid cartilage ventricule2. 3. arch of cricoid cartilage 7. subepiglottic 5. 4. cartilages of trachea cavity 5. lamina of cricoid cartilage 6. vestibular fold 3. 7. vocal fold 4. 4.
Hyaline cartilage: Thyroid cartilage Cricoid cartilage Arytenoid cartilage except the vocal processElastic cartilage: Vocal process of arytenoid cartilage Corniculate cartilage Cuneiform cartilage Epiglottic cartilage
Epiglottis stratified squamous nonkeratinized epithelium with high papillae on the pharyngeal surface stratified nonkeratinized squamous epithelium without papillae on the laryngeal surfaceLarynx ciliated pseudostratified columnar epitheliumVocal fold stratified squamous nonkeratinized epithelium
Find the characteristic items of the tracheal wall.
1. T. mucosa: - ciliated pseudostratified columnar epithelium - epithelium gradually decreases in its height, lamina propria becomes thinner towards the terminal bronchioli2. T. muscularis: smooth muscle layer in the larger bronchi is replaced by spirally arrenged smooth muscle cells in the smaller bronchi3. Cartilage plates: decrease gradually in number and size4. Adventitia: collagen fibers.In the wall of the bronchi small salivary glands can be found.