What is the name given to a group of cells that produce hormones?

A group of cells that produces hormones is known as a gland. Glands play a critical role in the endocrine system, which regulates various physiological processes through the secretion of hormones directly into the bloodstream. Hormones are chemical messengers that influence a range of functions, including metabolism, growth, and mood, among others.

Glands can be classified into two main types: endocrine glands, which release hormones internally into the bloodstream (such as the thyroid gland and adrenal glands), and exocrine glands, which secrete substances through ducts to an external surface (like sweat glands). The fundamental characteristic of glands is their specific function in hormone production and secretion, differentiating them from other types of cell groupings in the body.