Parts of a Microscope - SmartSchool Systems - Free Printable

Let’s go step by step to label each part of the microscope correctly. We’ll use standard microscope parts that are commonly taught in school.

1. The top part you look through — this is called the eyepiece or ocular lens.
2. The round part under the eyepiece that holds the lenses — this is the nosepiece (or turret).
3. The small lenses attached to the nosepiece — these are the objective lenses.
4. The flat platform where you put the slide — this is the stage.
5. The clips on the stage that hold the slide in place — these are the stage clips.
6. The hole in the center of the stage — this is the aperture (lets light through).
7. The knob below the stage that controls how much light comes up — this is the diaphragm (or iris diaphragm).
8. The very top part you look into — same as #1, but sometimes labeled separately as the ocular lens (but usually it’s just “eyepiece” for both 1 and 8 — wait, let’s check: actually, #1 points to the tube leading to the eyepiece, and #8 points to the actual eyepiece lens itself. So:
- #1 = body tube
- #8 = eyepiece

Wait — let’s double-check common labeling:

Standard labels from top to bottom:

- Eyepiece (what you look through) → #8
- Body tube (connects eyepiece to nosepiece) → #1
- Nosepiece (rotating part holding objectives) → #2
- Objective lenses → #3
- Stage → #4
- Stage clips → #5
- Aperture → #6
- Diaphragm → #7
- Arm (the curved part you carry the microscope by) → #9
- Coarse adjustment knob (big knob for big focus moves) → #10
- Fine adjustment knob (smaller knob for fine-tuning focus) → #11
- Base (bottom part that sits on table) → #12
- Light source (mirror or lamp at bottom) → Wait, #7 is pointing to the diaphragm, but what about the light? Actually, #7 might be the diaphragm, and the light source is often built into the base now. But in this diagram, there’s a circular part under the stage — that’s likely the light source or illuminator. Let’s reassign:

Actually, looking again:

#7 is pointing to the circular part UNDER the stage — that’s usually the illuminator (light source).

But then what is #6? #6 is pointing to the hole in the stage — that’s the aperture.

And #5 is pointing to the side of the stage — probably the stage clips.

Wait — let’s list all with correct standard terms:

Common 12-part labeling:

1. Body Tube
2. Nosepiece
3. Objective Lenses
4. Stage
5. Stage Clips
6. Aperture
7. Illuminator (Light Source)
8. Eyepiece
9. Arm
10. Coarse Adjustment Knob
11. Fine Adjustment Knob
12. Base

Yes — that matches perfectly.

So final answers:

1. Body Tube
2. Nosepiece
3. Objective Lenses
4. Stage
5. Stage Clips
6. Aperture
7. Illuminator (or Light Source)
8. Eyepiece
9. Arm
10. Coarse Adjustment Knob
11. Fine Adjustment Knob
12. Base

Final Answer:
1. Body Tube
2. Nosepiece
3. Objective Lenses
4. Stage
5. Stage Clips
6. Aperture
7. Illuminator
8. Eyepiece
9. Arm
10. Coarse Adjustment Knob
11. Fine Adjustment Knob
12. Base