======Human Cheek Cells Under Microscope====== **Materials: **{{$demo.materials_description}}\\ **Difficulty: **{{$demo.difficulty_description}}\\ **Safety: **{{$demo.safety_description}}\\ \\ **Categories:** {{$demo.categories}} \\ **Alternative titles:** Cheek Cell Microscope Slide ====Summary==== {{$demo.summary}} ====Procedure==== - Use a clean toothpick to gently scrape the inside lining of your cheek. - Place a small drop of water on the center of a microscope slide. - Roll and tap the toothpick onto the water drop so cheek cells transfer to the slide. - Place a cover slip carefully over the sample. - View the slide under scanning, low, and high power magnification. - To stain, add a drop of methylene blue or iodine to the edge of the cover slip and draw it across with a paper towel on the opposite side. - Observe the stained cells at different magnifications, focusing on the cell membrane, nucleus, and cytoplasm. ====Links==== How to Make a Wet Mount of Human Cheek Cells - Carolina Science: {{youtube>3aQYc6DeWsY?}}\\ Cheek Cells Under The Microscope - Sci- Inspi: {{youtube>jTSC4ntCPY4?}}\\ 📄 Human Cheek Cell Station - chess.cornell.edu: [[https://www.chess.cornell.edu/sites/default/files/inline-files/Human-Cheek-Cell-Station.pdf]]\\ ====Variations==== * Compare cheek cells with onion skin cells to contrast animal and plant cell structures. * Try different stains to highlight various cell components. * Record drawings or photos of cells under different magnifications. ====Safety Precautions==== * Do not gouge or scratch the inside of your cheek. * Dispose of used toothpicks in a biohazard or trash container immediately. * Handle stains with care; avoid skin or clothing contact. * Wash hands thoroughly after completing the activity. * Use caution with glass slides and cover slips to avoid cuts. ====Questions to Consider==== * What structures are visible in cheek cells under the microscope? (cell membrane, nucleus, cytoplasm) * How do animal cells like cheek cells differ from plant cells such as onion cells? (animal cells lack cell walls and chloroplasts, and are more irregular in shape) * Why is staining necessary to see the cell structures clearly? (many cell parts are transparent and difficult to distinguish without stain) * How does increasing magnification change the detail you can observe? (higher magnification shows more detail but reduces the field of view)