These are the parts of a typical bandsaw:

Frame: the structure that supports the rest of the bandsaw components
Upper Wheel: Adjustable wheel to allow for tensioning and tracking of the bandsaw blade
Lower Wheel: Connects to the motor by a pulley system (or v-belt) to power the wheels
Tires: Rubber on the wheels that provide traction for the blade to run on
Blades: Steel blade that have teeth on one edge
Guide Blocks: Keep the blade in place and from flexing while cutting stock
Table: Flat surface for supporting stock
Fence: Rigid guide that provides a distance setting, and support when ripping

[Sorry about the low quality images. These were found on the net and I do not know the original source]