Observing cells through temporary and permanent slides CLASS -IX IGCSE

 

Observing onion peel cells under a compound microscope reveals a structured, brick-like arrangement of plant cells. Key features visible include a thick cell wall, a thin, dense nucleus, and a large, central vacuole that often pushes the cytoplasm to the cell's edge. Staining with substances like safranin or methylene blue.

Cheek cell observation involves scraping the inner mouth lining to study human squamous epithelial cells under a microscope. Cells are stained with methylene blue to reveal a central nucleus, granular cytoplasm, and a thin cell membrane, confirming the absence of a cell wall or large vacuoles, characteristic of eukaryotic animal cells.

observing red blood cells (RBCs) requires a light microscope, typically  to visualize their small  biconcave, disc-like shape, which appears pale pink/red, lacks a nucleus, and shows a "dumbbell" profile. WBC's are little larger with multi nucleated appearance.

Students prepared temporary slides on their own. They used stains to observe the onion and cheek cells and glycerol over the stained sample so that sample does not dry. Then then put coverslip over the stained samples. observed under the microscope. 

The activity was a good learning experience for the learners to make them develop their lab skills, and give them concept clarity.