The tissue type in the image is a portion of what structure?

• A. A portion of kidney glomerulus
• B. A nerve fiber
• C. A cardiac myocyte
• D. A hepatocyte

Answer: (A)

A portion of kidney glomerulus is identified by a rounded tuft of numerous capillary loops surrounded by Bowman's capsule. The capillary network often appears with visible lumens and sometimes pale mesangial areas, all enclosed by a boundary formed by the parietal layer of Bowman's capsule. The filtration barrier features endothelial cells with fenestrations, a glomerular basement membrane, and podocytes on the visceral layer, which are hallmarks of the glomerulus in a nephron.

Nerve fibers would show bundles of axons with myelin sheaths rather than a capillary tuft. Cardiac myocytes would be large, branched muscle cells with striations and intercalated discs, not a capillary tuft. Hepatocytes would appear as polygonal liver cells arranged in plates with sinusoids and a central vein, not a glomerular tuft.