Lab 2 Epithelial Tissue: Index - 1)Introduction - 2)Simple Squamous - 3)Simple Cuboidal - 4)Simple Columnar - 5)PsuedoStratified - 6)Transitional - 7)Stratified Squamous - 8)Stratified Columnar - 9)Stratified Cuboidal - 10) Trachea and Esophogus Comparison - 12) Practical

1. Lining of sweat ducts or secretory ducts of salivary glands (transition between cuboidal and stratified columnar)

# 9 - Skin, monkey, h&e

# 11 - Skin of palm, human, h&e, 1.5 mm

The best example of stratified cuboidal epithelium can be found in the sweat ducts of the dermis of the skin. This epithelium may also occur in the interlobar ducts of the salivary glands (in the transition area between simple cuboidal and stratified columnar zone).

With the aid of your atlas (see Gardner, p. 208-209, and p. 214. Fig. 4), locate the sweat ducts deep in the dermis of the skin. The sweat ducts are lined with two layers of cells. The cells adjacent to the lumen have a cuboidal shape, and hence the tissue is stratified cuboidal epithelium. Note that the sweat ducts stain more darkly than the sweat glands.

References: Gartner, p. 41, Fig. 4Ross, p. 398 - 399, Fig. 1 Wheater, p. 167, Fig. 9.15 a, b DiFiore, p. 145, Fig. 10-7