Which organ in the body produces insulin?

The pancreas is the organ responsible for producing insulin. Insulin is a crucial hormone that regulates blood glucose levels by facilitating the uptake of glucose into the cells, where it can be used for energy or stored for future use. The pancreas contains clusters of cells known as the islets of Langerhans, which contain beta cells specifically tasked with the production of insulin in response to rising blood sugar levels, such as after eating.

This hormone plays a vital role in maintaining homeostasis within the body, and its proper function is essential for preventing conditions like diabetes mellitus. The other organs listed do not produce insulin; the liver primarily processes nutrients and stores glycogen, the kidneys filter blood and maintain fluid balance, and the intestines are involved in digestion and absorption but do not synthesize insulin.