Topic 5 - Epithelial Tissues Flashcards
(24 cards)
Give the four varieties of Epithelial tissue.
Surface, Secretory, Sensory, Pigment.
Surface Epithelial Tissues
Cover outer and inner body surfaces. Form layers of basal lamina Act as protection and interfaces.
3 shapes of 1 layer surface Epithelial cells.
Squamous (Flat), Cuboidal, Columnar
Give 3 surface epithelial classes.
Pseudostratified Transitory Stratified
Secretory Epithelial Tissues
Gland from surface epithelial. Forms invaginations
“Endocrine”
Secretes into the blood stream
“Exocrine”
Secretes onto a surface
Where would simple cuboidal epithelium be found?
Lining Follicles in the thyroid Kidney
Pseudostratified Columnar Epithelia
Found in Male urethra and trachea
Transitional Epithelium
The luminar surface of umbrella cells is covered by…
Calyx/Crusta
Stratified epithelia have a can have a … surface.
Keratinised
What defines simple epithelia?
It is composed of 1 layer of cells
Squamous Epithelia
Thin
Allows transport over membranes
Found in endothelium and alveoli
Simple Cuboidal
Forms ducts and secretory cells in glands
Simple columnar
Tall, narrow, nuclei are near basal lamina
Endoepithelial cells are found…
On the surface layer
Exoepithelia are found…
In the underlying connective tissue
3 varieties of exocrine gland.
Tubular, Acinar and Tubuloacinar.
What is stroma?
Surrounds glands, made of collagen
What are the three modes of secretion?
Merocrine, Apocrine, Holocrine
Describe Serous Acini with example of where found
Narrow lumen, secreteory cells, thin, watery fluid
Pancreas
Describe mucous acini
Wide lumen, flattened nuclei, produces thick mucin, lubricates organ linings
Describe seromucous Acini
Surrounded by a serous ‘Demilune’ Empty products through small channels.
