https://microbeonline.com/microtome-parts-types-and-uses/

• Disease Diagnosis: When a doctor takes a biopsy (a small tissue sample) from a patient, that sample needs to be processed and thinly sliced. A pathologist then examines these slices under a microscope to identify diseases like cancer, infections, or other cellular abnormalities. Accurate diagnosis relies entirely on having properly prepared, thin sections.
• Research: Scientists study tissue sections to understand disease progression, cell function, and the effects of treatments. Microtomy allows them to compare normal and diseased tissues at a cellular level, revealing critical insights.
• Education: Medical students and researchers learn about tissue histology (the study of microscopic tissue structure) by looking at prepared microtome sections.

• Knife/Blade Holder Assembly: This is where the microtome knife or disposable blade sits. It needs to hold the blade firmly and at a specific angle (the clearance angle) so it can cut precisely. If the angle's wrong, you'll get compression or chattering.
• Specimen Holder/Block Holder: This part grips the tissue block securely. The block is usually embedded in paraffin wax or frozen. It needs to be stable and move consistently.
• Feed Mechanism: This is the brains of the operation. It's an ultra-precise mechanism that advances the specimen block towards the knife by a tiny, set amount after each cut. This distance determines your section thickness.
• Operating Handle/Wheel: You turn this manually on most microtomes to move the specimen up and down, past the blade. Some automated microtomes have motor-driven cranks.

Microtomes are essential in histology, pathology, and research for preparing tissue samples. The type of microtome you use largely depends on the tissue consistency, the desired section thickness, and how the tissue was prepared (e.g., frozen, embedded in wax).

At its heart, a microtome has three main parts:
* Specimen Holder: This is where you mount your tissue block.
* Knife Holder: This securely holds a sharp blade (steel, glass, or diamond).
* Feed Mechanism: This precisely advances the specimen towards the blade for each cut, determining the section thickness.

You'll generally encounter two main categories: reusable knives and disposable blades.