Oral Mucosa components salman khutsheed.pptx
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Enumerates components of oral mucosa
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Oral Mucosa components salman khutsheed.pptx
- 2. Knowing nothing is not a matter of shame. uval Noah Harari is an Israeli author, public intellectual, historian and professor in the Department of History at the Hebrew University of Jerusalem.
- 3. Oral Mucosa
- 4. Learning objectives • Define oral Mucosa. • Classify oral mucous membrane • Explain the components of oral mucosa
- 5. Oral mucosa The term mucous membrane is used to describe the moist lining of the gastrointestinal tract, nasal passages, and other body cavities that communicate with the exterior. In the oral cavity, this lining is referred to as the oral mucous membrane, or oral mucosa
- 6. Components of Oral mucosa:
- 7. Components of Oral mucosa:
- 9. Lamina propria Fibers and Ground Substance • Collagen---Type I and III, Type V in the inflammed tissue • Elastin (flexible lining mucosa) that together with fibronectin embed in the ground substance. • Ground Substance: amorphous at the molecular level • Proteoglycans: In the oral mucosa the proteoglycans are represented by hyaluronan, heparan sulfate, versican, decorin, biglycan, and syndecan. • Glycoproteins: have a polypeptide chain to which only a few simple hexoses are attached. • Cells: The lamina propria contains several different cells: fibroblasts, macrophages, mast cells, and inflammatory cells.
- 10. Keratinized OM and NON keratinized OM. • The classification of oral mucosa into keratinized and non-keratinized is primarily based on the presence or absence of keratinized epithelial cells in the tissue. Keratinization is a natural process that occurs in the epithelial cells of the skin and certain mucosal surfaces • ,
- 11. Keratinized oral mucousa Connective Tissue Papila Epithelial Rete Ridges’ Sub mucousa 2/3 Keratohyaline granule ;linking of tonofailments to form tonofibrils Lamellate granules;fuse with CM and release lipds in ICS OR act as a barriers . No nucleus ,densly packed tonofibrills ,keratine protein , 1 2 3 4 Same in both keratinize OM and non keratinized OM ALMOST . 2 1`
- 12. ½ of its number and 2/3 its thickness of both kert OM and non kert OM The cells produce keratohyalin granules (discussed later), which release the precursor of the intermediate filament protein filaggrin protective layer called the cornified cell envelope, which consists essentially of keratins embedded in an insoluble amalgam of proteins surrounded by lipids
- 14. Anatomical classification OF OM. 2
- 15. OM TONGUE
- 16. Functions of oral mucosa: • Protection • Sensation • Secretion • Thermal Regulation
- 17. Protection:
- 18. Secretion: • Saliva: • major and minor salivary glands • Sebaceous glands commonly are present in the oral mucosa, but their secretions are probably insignificant
- 19. Sensation:
- 21. ANY QUESTION ?
Hinweis der Redaktion
- Mucous membrane is used to describe the moist lining of GIT, nasal passages and other cavities of body that communicate with the exterior In oral cavity this lining is Oral mucous membrane or oral mucosa At the lips the oral mucosa is continuous with the skin; at the pharynx the oral mucosa is continuous with the mucosa lining the rest of the gu Located between skin and GIT and shows some properties of each
- In the skin these two tissues are known as the epidermis and dermis
- OM separates and protects deeper tissues and organs from the environment of oral cavity The normal activities of seizing food and biting and chewing expose the oral soft tissues to mechanical forces The oral mucosa shows a number of adaptations of the epithelium and the connective tissue to withstand these insults. The epithelium of the oral mucosa acts as the major barrier to these threats.
- The major secretion associated with the oral mucosa is saliva. Salivary secretion is important for moistening the oral cavity comes from The major salivary glands are situated distant from the mucosa, and their secretions pass through the mucosa via long ducts; however, many minor salivary glands are associated with the oral mucosa
- Sensory function is important because it provide considerable information about events in oral cavity. Reflexes such as swallowing, gagging, retching, and salivating also are initiated by receptors in the oral mucosa.
- In some animals (such as the dog), considerable body heat is dissipated through the oral mucosa by panting