This is a tutorial slideshow showing the internal structure of an animal eukaryotic cell. Each slide has excellent labeled drawings accompanied by descriptive text explaining the function of each part.

Labeled illustration of a plant and an animal cell and their parts.

Labeled illustration showing the parts of a cell.

A brief animation and a more detailed navigation of a cell and it's structure can be found here. Each part is labeled and some are animated.

This resource shows the dissection of a plant cell and labels the parts. Also provided is an in-depth discussion of the ground tissue system. This resource is in PDF form; requires Adobe Reader.

Excellent site to review what you know. You're given a labeled diagram of a neuron and you must identify the parts. Good Luck!