Epiglottis

Slide 111: Epiglottis H/E This slide is a sagittal section through the epiglottis. Identify microscopically: Epithelium of the anterior surface Epithelium of the posterior surface Lamina propria Cartilage Draw and annotate: A line drawing of the different tissues comprising the epiglottis.   Reflection: How do the two surfaces differ from one another as far as their mucosal layers are concerned? Which distinctive structures are found in the lamina propria? What type of cartilage is found?

Plaatjies

Microscope Cross section through the epiglottis Elastic cartilage in the epiglottis Elastic cartilage and glands in the epiglottis Stratified squamous nonkeratinizing epithelium Mucous gland with serous acini Mucous gland with serous acini Mucous gland with serous acini Mucous gland with serous acini

Clinical anatomy Normal larynx Drawing of the pharynx Anatomy of the larynx Pathology Hypopharynx Carcinoma Omega shaped epiglottis

Calibration

1. What is the primary function of the epiglottis?
2. What type of cartilage makes up the epiglottis?
3. How is the epiglottis attached to the laryngeal prominence of the thyroid cartilage?
4. What connects the lateral margins of the epiglottis to the arytenoid cartilages?
5. What covers the lingual surface of the epiglottis?
6. What lies posterior to the hyoid bone and thyrohyoid membrane?
7. What is the blood supply to the epiglottis?
8. Which nerve innervates the epiglottis?
9. What is the histological composition of the epiglottis?
10. What condition involves inflammation of the epiglottis?
11. What type of epithelial tissue lines the surface of the human epiglottis?
12. Describe the role of the epiglottic cartilage in the structure of the epiglottis.
13. What are the main types of cells found in the epithelium of the epiglottis?
14. How does the histology of the epiglottis differ from that of the nearby pharyngeal mucosa?
15. What is the function of the numerous lymphoid follicles present in the epiglottic epithelium?
16. How does the presence of elastic fibers contribute to the flexibility of the epiglottis?
17. Describe the vascular supply to the epiglottis and its significance.
18. What role do goblet cells play in the histology of the epiglottis?
19. How does the histology of the epiglottis change during swallowing?
20. What structural features help protect the airway during the passage of food or liquid over the epiglottis?