Epithelia and Glands

Epithelia slide # 1, 2, 45, 82, 61, 84, 97

Next Week's Glands slide # 11, 12, 69, 44, 45, 65

http://en.wikipedia.org/wiki/Epithelium

http://www.lab.anhb.uwa.edu.au/mb140/corepages/epithelia/epithel.htm

Students should start to get used to referring to tissue as either epithelial, connective (a weird category), muscle, or nervous.

With epithelia, know how to identify simple versus stratified or pseudo-stratified.  Also be able to identify squamous, cuboidal, and columnar cell types.

http://antranik.org/eight-types-of-epithelial-tissue/

Always identify epithelia based on the free surface (away from basement membrane).

Simple squamous epithelia under light microscopy are identified by a layer of flat nuclei:

Cell Adhesion (holding an epithelia, or other tissue types together)

Note* Gap Junction = Nexus

Key words:

Basal lamina is usually seen in electron microscopy.

Basememnt membrane is associated with light microscopy.

Both are the extracellular lining to which epithelial cells adhere, and from which epithelial tissues grow.  These terms are often used interchangeably, though they technically denote two different entities.  Remember the previous references to histological artifacts.**

http://en.wikipedia.org/wiki/Decidual_reaction