The histological structure of the oral cavity

The histological structure of the oral cavity

1. Oral Cavity and Lip By Dr. Shereen Hamed Lecturer of Histology & Cell Biology Faculty of Medicine. Mansoura University

2. The histological structure of the oral cavity

3. Oral cavity The oral cavity is the entrance for digestive tract It includes: 1- Lips 2- Cheeks 3- Gums (gingiva) 4- Floor of the mouth 5- Hard & soft palate 6- Teeth 7- Tongue The major & minor salivary glands open into it by ducts

4. The histological structure of the lip

5. The Lip Structure: 1- Outer surface 2- Inner surface 3- Middle layer 4 - Lip margin

6. T hin skin: Epidermis: stratified squamous keratinized epithelium Dermis: loose C.T . rich in bl. V. . hair follicles. sweat & sebaceous glands 1) Outer surface of lip

7. Mucous membrane 1- Epithelium: Stratified squamous non keratinized thick transparent rich in in nerve endings & glycogen 2- lamina propria (corium) contains labial mucous glands 2 ) Inner surface of lip

8. Bundles of skeletal muscles (orbicularis oris muscle) run in various directions 3)Middle layer of Lip

9. 1- Epidermis St.Sq . partially k., transparent 2- Dermis deep dermal papillae Many bl vs (red margin) Many nerve endings (very sensitive) N o hair follicles. no sweat glands & no sebaceous glands The red margin helps diagnosis of anemia & cyanosis Modified skin 4 4) Red margin

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11. References Principles of histology, (student book of Histology & Cell Biology Department, faculty of medicine, Mansoura university) Basic Histology, text book of histology & cell biology Internet sources