Euglenas in Suspension 50 mL

Quick Answer: Euglenas in Suspension 50 mL is a live euglena culture: single-celled green flagellates in 50 mL of liquid, ready for microscope observation. Biology classes use it to study a protist that photosynthesises like a plant yet swims and can feed like an animal.

Why Euglena Is Studied Live

Euglena is a single, spindle-shaped cell with green chloroplasts, a red eyespot near the front end and a long flagellum that pulls it through water. Under the microscope students see two kinds of movement: smooth swimming driven by the flagellum and a creeping, shape-changing wriggle called euglenoid movement, made possible by the flexible protein strips of the pellicle beneath the cell membrane.

Euglena is mixotrophic. In light it photosynthesises and stores food as paramylon, a carbohydrate unlike plant starch; kept in darkness with dissolved organic matter, many strains can absorb nutrients instead. That combination is why it is the classic organism for asking students whether a living thing must be either a plant or an animal, and why it is placed today among the protists.

A live culture shows behaviour that no model can. Cells gather where light is moderate, a response called phototaxis that relies on the eyespot shading a photoreceptor swelling near where the flagellum emerges. The species and cell density of this culture are not stated in the listing.

Classroom Investigations

• Observing flagellar swimming and euglenoid movement in wet mounts
• Phototaxis experiments with tubes partly wrapped in foil
• Comparing Euglena with Paramecium and Amoeba in lessons on protists
• Relating the living cell to the enlarged Euglena model
• Starting new subcultures in Complete Euglena medium

Specifications

Care After Delivery

• Open the euglena culture on arrival, loosen the cap to let in air and stand it upright at room temperature in bright, indirect light.
• Keep it away from direct sun, heaters and cold windows; temperature extremes kill cultures quickly.
• Take samples from where the green cells gather rather than from the clear liquid.
• Plan observation within the first days and subculture if you need cells for longer.

Why Choose LabEquip

Schools and colleges order live Euglena for the practical on protists, where a moving green cell makes a stronger impression than a prepared slide. LabEquip supplies it with its biology lab products range; share the date of your practical through the contact page so the culture arrives when it is needed.

Frequently Asked Questions

How do I keep a Euglena culture alive after it arrives?

Loosen the lid so air can enter, stand the container upright at room temperature and give it bright indirect light, such as a north-facing window or a lamp at a distance. Avoid direct sun and cold rooms. For longer use, transfer some cells into fresh Euglena medium.

How do I prepare a slide of Euglena?

Take a drop from the greenest part of the culture, place it on a slide and lower a coverslip at an angle. Start at low power to find the cells, then move to high power. A drop of methyl cellulose slows fast swimmers so the eyespot and flagellum can be seen.

Should Euglena be classed as a plant or an animal?

As neither. Its chloroplasts let it photosynthesise like a plant, yet it lacks a cell wall, swims with a flagellum and can absorb organic food, which are animal-like traits. It is classified among the protists, in the euglenid group.

How can students show that Euglena responds to light?

Wrap part of a test tube of culture in foil, leaving a window, and leave it in the light for an hour or two. The cells gather in the lit window. Reversing the arrangement shows the response again, and the result can be linked to the eyespot.

Why can I not see the flagellum under the microscope?

The flagellum is very thin and beats rapidly, so it is hard to see in live, fast-moving cells. Slowing the cells with methyl cellulose, closing down the condenser diaphragm to increase contrast, or adding a drop of iodine solution to fix and stain the cells helps.

How should used culture be disposed of?

Treat it like any microbial culture: add a disinfectant or autoclave it before pouring it away, and disinfect slides and containers used with it. Never release cultured organisms into ponds or drains.

Last Updated: September 2026