Prepared Slide Set of 25

Quick Answer: The Prepared Slide Set of 25 is a prepared slide set: 25 permanent microscope slides of fixed, stained specimens, supplied in a box. It lets students study cells, tissues and organisms under the microscope without having to make each preparation themselves.

How Prepared Slides Are Made

A prepared slide is the end of a long process. The specimen is fixed so its cells stop changing, dehydrated, embedded and cut into sections a few micrometres thick on a microtome, or else spread thinly as a smear or mounted whole if it is small enough. The section is stained, commonly with haematoxylin, which colours nuclei blue-purple, and eosin, which colours cytoplasm pink, then sealed under a coverslip with a permanent mounting medium. Properly stored, such slides remain usable for many years.

Twenty-five slides is a typical size for a general-purpose teaching set, enough to cover a range of plant tissues, animal tissues and microorganisms across a year. The product photo shows the slides in a plastic box with individual slots. The listing does not name the specimens included, so compare the contents list with your syllabus before ordering; subject-specific collections such as zoology prepared slides are also available.

Prepared slides are a reliable reference point. Student-made wet mounts vary in quality, but a stained, sectioned slide shows the structure clearly every time, which makes it useful for teaching microscope skills, for drawing practice and for practical exams.

Using the Slide Set

• Teaching students to focus, move between objectives and draw what they see
• Comparing plant and animal tissues in secondary biology
• Revision and practical exam preparation with specimens students must identify
• Supporting microscope work in nursing, pharmacy and first-year college biology

Specifications

Protecting the Slides

• Store the prepared slide set flat in its box, away from heat and direct sunlight, which soften mountant and fade stain.
• Focus with the coarse control only at low power, so the objective never presses on the coverslip.
• Wipe immersion oil off the coverslip with lens tissue after oil-immersion work.
• Hold slides by the edges and return each to its numbered slot after use.

Why Choose LabEquip

Schools and colleges buy a prepared slide set to give every microscope bench a reliable set of specimens from the first practical onwards. LabEquip offers the set in its biology lab products range, with further collections in the prepared slides section.

Frequently Asked Questions

Which specimens are in the Prepared Slide Set of 25?

The listing does not name them. General teaching sets of this size usually include plant stem, root and leaf sections, animal tissues such as blood, muscle and nerve, and microorganisms such as bacteria, yeast and algae. Ask for the contents list at enquiry to match it to your syllabus.

What do the letters WM, TS, LS and CS mean on slide labels?

WM means whole mount, a small organism or part mounted intact. TS is a transverse section, cut across the specimen. LS is a longitudinal section, cut along its length. CS, cross section, is another name for a transverse section.

Why do some slides show pink and purple colours?

Many animal tissue slides are stained with haematoxylin and eosin. Haematoxylin gives nuclei a blue-purple colour, while eosin tints cytoplasm, muscle fibres and connective tissue in pinks and reds, making the parts of each cell easy to tell apart.

How should students start viewing a prepared slide?

Place the slide with the coverslip up, start with the lowest-power objective, focus with the coarse control, then centre the area of interest before moving to a higher power and using only the fine control.

How long do prepared slides last?

With a permanent mountant and careful storage, prepared slides last many years. They are damaged mainly by breakage, heat that softens the mountant, strong light that fades stains and objectives pressed onto the coverslip.

Why use prepared slides if students can make their own?

Home-made wet mounts teach technique but are temporary and variable. Prepared slides show sections and stains that need a microtome and several days of processing, so students see structures such as tissue layers clearly and consistently.

Last Updated: September 2026