The 'Islets of Langerhans' is found in which human organ?

The story behind the answer

The Islets of Langerhans are clusters of endocrine cells in the pancreas that regulate blood glucose. Different cell types release key hormones: beta cells secrete insulin to lower blood sugar, alpha cells release glucagon to raise it, delta cells produce somatostatin, and PP (F) cells make pancreatic polypeptide. This hormonal control distinguishes the islets from the surrounding exocrine pancreas, which produces digestive enzymes.

Named after German anatomist Paul Langerhans (1869), the “islets” look like islands scattered in a sea of enzyme‑secreting tissue. Memory tip: “Islets = islands in the pancreatic sea.” Dysfunction or loss of beta cells leads to diabetes mellitus, highlighting the islets’ central role in energy balance and metabolism.