EPITHELIAL TISSUE
according to the cell arrangement: sheet (membranous), trabecular, reticular
according to the function: covering, secretory, absorptive, respiratory, sensory,
myoepithelial cells
Covering epithelium - classification
Simple
• Simple squamous
• Simple cuboidal
• Simple columnar
• Pseudostratified columnar
according to the number of cell layers and shape* of cells in the
most superficial layer
Stratified
• Stratified squamous
(nonkeratinized)
• Stratified squamous
keratinized
• (Stratified cuboidal)
• Stratified columnar
• Transitional
*cell membrane is usually not seen very well;
shape of nuclei helps us determine shape of cells
b.m.
Simple squamous epithelium
Simple squamous and simple cuboidal epithelium – kidney (cortex)
glo
pt
dt
pt
Simple squamous and cuboidal epithelium – kidney (medulla)
Simple low columnar epithelium - kidney
Simple columnar epithelium – vesica fellea
lamina propria
lumen tunica muscularis
- smooth muscle
tissue
Pseudostratified columnar epithelium with cilia - trachea
Stratified squamous epithelium - oesophagus
Stratified squamous epithelium - cornea
Stratified keratinized squamous epithelium - epidermis
Stratified columnar epithelium (palpebra – conjunctiva)
gll
m
Transitional epithelium - ureter
Transitional epithelium – calyx renalis
lamina
basalis
lamina basalis
lamina fibroreticularis
Basement membrane
(0,5 - 1 m)
fused laminae basales of epithelial
(podocyte) and endothelial cell
Glomerular basement membrane
endo
epi
Slides:
Simple squamous and cuboidal epithelium (30, 31. Ren)
Simple columnar epithelium (22. Vesica fellea)
Pseudostratified columnar epithelium with cilia (27. Trachea)
Stratified squamous (nonkeratinized) epithelium (11. Esophagus)
Stratified squamous keratinized epithelium (70. Skin from axilla)
Transitional epithelium (32. Renal calyx, 33. Ureter)
Stratified columnar epithelium (91. Palpebra)
Atlas EM:
Surface of epithelial cells – microvilli, brush border, striated border (16, 24-26,
62-63)
Surface of epithelial cells – cilia (20, 21, 23, 60)
Lamina basalis (26, 27, 57), basal labyrinth (27)
Simple low columnar epithelium (18)
Alveolar epithelium (55, 61)
EPITHELIAL TISSUE