4. Tissues & Histology

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

a. __

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

b. ___

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. ___

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

f. ___

Which of the following epithelia most easily permits diffusion?

(a) Stratified squamous

(b) Simple squamous

(c) Transitional

(d) Simple columnar

What are the four essential functions of epithelial tissue?

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?

In adults, over 90% of all cancers are either adenomas (adenocarcinomas) or carcinomas. In fact, cancers of the skin, lung, colon, breast, and prostate are all in these categories. Which one of the four basic tissue types gives rise to most cancers? Why do you think this is so?

Why are there no skin cancers that originate from stratum corneum cells?