Epithelium Flashcards
Origin of eptihelial cells (which germ layer)
ectoderm
Name the 4 types of tissues in body
Epithelial, connective, muscle, nervous
2 types of epithelium
- membranous epithelium
2. glandular epithelium – secrete substances
5 characteristics of epithelial tissues
- Cellularity
- Polarity
- Attachment – basement membrane
- Avascularity
- Regeneration
4 Functions of epithelial tissue
- Protection
- Permeability
- Sensation
- Secretion
2 Classifications of epithelium based on layer
- Simple
2. Stratified
Classifications of epithelium based on shape
- Squamous
- Cuboidal
- Columnar
- Pseudostratified
- Transitional
What type of epithelium is oral mucosa lined by?
stratified squamous epithelium
Which type of epithelium can be referred to as keratinised/ non-keratinised?
Stratified squamous epithelium
e.g. oral mucosa
2 constituent layers of oral mucosa?
Epithelium Lamina propria (loose connective tissue)
Layer underneath oral mucosa? What type of connective tissue is it?
submucosa – dense irregular connective tissue
Structure & Function of a stratified epithelium
multiple layers of cells –> more difficult to penetrate –> able to withstand strong forces
Structure & Function of loose connective tissue
cells are surrounded by a matrix –> flexible –> allow more movement
3 Categories of oral mucous membrane (oral mucosa) and exmamples
- Specialized (e.g. dorsum of tongue)
- Masticatory (e.g. gingiva & hard palate)
- Lining (all other areas)
4 layers of cells in orthokeratinized epithelium
- stratum corneum
- stratum granulosum
- stratum spinosum
- stratum basale