4. Tissues & Histology

Describe the roles of the following components of the ECM:

Glycoproteins (cell-adhesion molecules)

In adults, over 90% of all cancers arise in epithelium. Such cancers are called carcinomas, or adenomas (adenocarcinomas) if they arise in glandular epithelia. In fact, cancers of the skin, lung, colon, breast, and prostate are all in these categories. Why do you think this is so?

Imagine that a disease turns the simple epithelia of the lungs, kidney tubules, and intestines into keratinized stratified squamous epithelia. What effect would this change in form have on the functions of these tissues?

Identify the six types of epithelial tissue shown in the drawing below.

d. ___

Identify the six types of epithelial tissue shown in the drawing below.

e. ___

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Epithelial tissues are classified by cell shape and the number of cell layers.

Together the basal lamina and the reticular lamina make up the _____________________. The basal lamina is produced by the _________________, while the reticular lamina is produced by the ____________________.

Identify the six types of epithelial tissue shown in the drawing below.

f. ___

Which epithelium is 'built' to withstand friction?

a. Simple squamous

b. Stratified squamous

c. Simple cuboidal

d. Simple columnar

e. Pseudostratified