| A | B |
| Arm | Supports body tube; used for carrying microscope |
| Base | Supports microscope; used for carrying microscope |
| Mirror | Collects light and directs it through opening in stage |
| Eyepiece | Place to look through to view object; magnification power of 10x |
| Body Tube | Maintains proper distance between eyepiece and objective lenses |
| Stage | Supports slide being viewed |
| Stage Clips | Holds slide in place on stage |
| Diaphragm | Located under stage; various sized openings to increase or decrease light entering stage |
| Revolving Nose Piece | Holds objective lenses; rotates to change magnification |
| Objective Lenses | Magnifies object being viewed; low (4x), medium (10x), high (40x) |
| Low-Power Objective Lens | Magnifies 4x |
| Medium-Power Objective Lens | Magnifies 10x |
| High-Power Objective Lens | Magnifies 40x |
| Total Microscope Magnification | Eyepiece Magnification x Objective Lens Magnification |
| Coarse Adjustment Knob | Moves body tube up & down to adjust focus; use with low & medium objectives |
| Fine Adjustment Knob | Adjustment for clear, sharp focus; use for small adjustments only |