Which tissue is shown in the image?

• A. Kidney
• B. Liver
• C. Spleen
• D. Brain

Answer: (A)

Focus on identifying tissue by its microscopic architecture, especially the nephron structures. If you can spot a glomerulus with Bowman's capsule and surrounding tubules—proximal tubules with a bright, brush-border–like lining and distal tubules—arranged in the cortex, that pattern points to kidney. This set of features distinguishes it from other organs: liver would show hepatocytes organized in plates with sinusoids and a central vein; brain would reveal neurons with large cell bodies and neuropil rather than tubules; spleen would display white pulp around arteries and red pulp rich in blood-filled cords. The presence of nephron units and the specific tubular organization is the hallmark of renal tissue.