Epithelia Flashcards
Epithelia
Layers of cells covering internal or external surfaces
Five characteristics of epithelia ( CRAAP)
Cellularity
polarity
attachment,
vascularity
regeneration
Functions of epithelia ( PPSS)
 Provides physical protection, control permeability
provides sensation
produce secretion
Simple squamous epithelium
Absorption and diffusion
Mesothelium
Lines body cavities
Endothelium
Lines heart and blood vessels
Squamous stratified
Protects against attack
Keratin protein
Simple cuboidal
( kidneys, glands, ducts)
Secretion and absorption
Stratified cuboidal
Sweat ducts and mammary ducts
Simple columnar
Absorption and secretion
Pseudostratified columnar
Cilia movement
Stratified columnar
Protection
Glandular epithelia (2)
Endocrine
Exocrine
3 characteristics Endocrine gland
Release hormone
Interstitial fluid
No ducts
Exocrine glands
Produced secretion
Epithelia surface
Through ducts
Modes of glandular secretion (HAM)
Mecrocrine
Apocrine
Holocrine
Types of glandular secretion
Serous
Mucous
Mixes exocrine ( both serous and mucous)
Location of simple squamous epithelium
1.lining heart
2.kidney tubules
3.lining cornea
4.alveoli of lungs
Squeamish stratified examples
- Surface of skin.
- Lining of mouth.
- Throat/esophagus
- Rectum/anus/vagina.
Simple cuboidal examples
- Glands
- Kidney tubules.
- Thyroid gland.
Stratified cuboidal examples
Ducts of sweat, glands, and mammary glands