Where is insulin produced in the human body?

Insulin is produced in the pancreas, specifically in the beta cells located within the islets of Langerhans. This hormone plays a crucial role in regulating blood glucose levels by facilitating the uptake of glucose into the body's cells, where it can be used for energy or stored for future use. The pancreas functions as an endocrine organ by releasing insulin directly into the bloodstream in response to elevated blood sugar levels, typically after meals.

In contrast, other organs listed, such as the liver, kidneys, and stomach, perform different functions. The liver is involved in glucose storage and release, the kidneys assist in filtering blood and managing waste products, and the stomach primarily aids in digestion, none of which are directly related to the production of insulin. Understanding the role of the pancreas in insulin production is essential for comprehending overall glucose metabolism and its impact on conditions such as diabetes.