| A | B |
| stage aperture | allows light to pass through the stage |
| coarse adjustment knob | brings objects into rapid but rough focus |
| diaphragm | regulates amount of light entering scope |
| low power objective | is attached to the nosepiece and magnifies 4x |
| medium power objective | is attached to the nosepiece and magnifies 10x |
| stage | supports the slide |
| lamp | provides light to see things in the scope |
| revolving nosepiece | turns to change from one objective to another |
| eyepiece | contains an immobile lens that magnifies 10x |
| fine adjustment knob | brings objects slowly into fine focus |
| high power objective | is attached to the nosepiece and magnifies 40x |
| body tube | carries light from the objectives to the eyepiece |
| arm | supports all the lenses above the stage |
| base | the bottom of the microscope |
| dust cover | keeps the microscope clean while not in use |
| cord | brings electricity to the lamp |