Follow this interactive to identify the differences between bacteria and viruses. Look through the lens of a microscope to observe how each functions and impacts humans.

Take an interactive quiz over protists. After completing the quiz, check your score, and then revisit any incorrect question for further review.

Take this interactive, multiple-choice quiz over protists, then review your score and any missed questions at the end.

Introduction to neuron structure, function, and classification. Provides simple diagrams of neurons conducting an impulse and microscope images of nerve cells.

In this classroom lab experiment, students mimic optimal growth conditions for yeast, and with the help of a microscope, observe and record results using a cell counting method.

Complete directions for a teacher demonstration in which the electrolysis of a solution of silver nitrate is viewed under a microscope. Helpful tips and a diagram of the apparatus and set-up is provided. Easily adaptable as a student lab...

Find out about the work done by the medical laboratory technician. It involves examining both body fluids and cells under the microscope or with specialized computer equipment, analyzing the results, and forwarding that information on to...

Investigate this collection of microscopic samples of tissues and cells from the endocrine system.

A video showing and explaining that capillaries are microscopic blood vessels that are one cell layer thick. [0:13]