At 40× magnification Overview of bronchus within lung tissue: visible hyaline cartilage plates surrounded by alveoli Lumen lined with pseudostratified ciliated columnar epithelium; goblet cells and seromucous glands present in submucosa Smooth muscle band seen between cartilage and mucosal layer At 100× magnification Epithelial details clearer: cilia atop columnar cells, goblet cells apparent Mucosal folds … Read more
Allium (onion) root tip longitudinal section (L.S.) is a classic microscopic slide used to study various stages of mitotic cell division. Under a compound microscope, the root tip appears as an elongated structure with a clearly visible root cap at one end and a zone of actively dividing cells (meristematic region) just behind it. The … Read more
The onion root tip is ideal for studying mitosis under the microscope because it contains actively dividing meristematic cells with clearly visible chromosomes when stained. Mitosis in onion root tip cells can be observed in the following stages: Interphase The cell appears normal with a distinct nucleus and a clear nuclear membrane. Chromosomes are not … Read more
Under the microscope, guard cells appear as specialized, kidney-shaped (in dicots) or dumbbell-shaped (in monocots) pairs of cells that flank a central pore called the stoma (plural: stomata) on the surface of leaves, especially on the lower epidermis. Microscopic Appearance of Guard Cells: Guard cells are usually kidney-shaped in dicotyledonous plants (e.g., bean, sunflower) and … Read more
There are irregularly shaped crystalline or solid residues, which are likely salt crystals, predominantly sodium chloride, formed as the sweat droplet dried on the slide. One of the larger fragments on the left side appears dendritic or branched in structure, suggesting it could be a crystallized mineral component formed through slow evaporation. In the central … Read more
Staphylococcus aureus is a Gram-positive, round-shaped (coccus) bacterium that commonly colonizes the skin and mucous membranes of humans and animals. It is a facultative anaerobe and non-motile organism. It is a member of the genus Staphylococcus, and one of the most significant pathogens in both community-acquired and hospital-acquired infections. Microscopically, S. aureus appears as clusters … Read more
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