Texas Education Agency
Texas Gateway: It's All About Cell Theory
The following tutorial is an explanation of cell theory.
Other
Pathology Guy: Dr. Rudolf Virchow Visits the 1990's
A long document on Rudolf Virchow, founder of modern pathology. This is written in form of a dramatic monologue, but it was not actually a speech given by Dr. Virchow. Actual quotations from Dr. Virchow are in CAPITAL LETTERS.