There is no single agreed-upon number for how many glands exist in the human body, because the answer depends entirely on what you count. If you’re talking about major named glands, the number is roughly a few dozen. If you include every tiny, microscopic gland embedded in your skin, digestive tract, and airways, the total climbs into the millions. The human body contains somewhere between 2 and 4 million sweat glands alone, so any headline number would be meaningless without context. Here’s how to actually think about it.
Why There’s No Single Number
Glands range enormously in size. Your liver weighs about 1.4 kilograms. A single goblet cell, a mucus-producing gland found in your gut lining and airways, is microscopic. Both qualify as glands because both produce and release a substance your body needs. Counting them side by side is a bit like asking “how many water sources are on Earth?” and expecting a number that includes both the Pacific Ocean and a backyard well.
The most useful way to understand your body’s glands is by type: endocrine glands release hormones directly into your bloodstream, and exocrine glands release their products through ducts onto a surface (your skin, your digestive tract, your eyes). Some organs do both.
The Major Endocrine Glands
Your endocrine system has roughly 8 to 10 primary glands, depending on how you count paired structures. The major ones are the pituitary, pineal, thymus, thyroid, parathyroids (four small glands behind the thyroid), and the two adrenal glands sitting on top of your kidneys. The ovaries in women and testes in men also function as endocrine glands, releasing sex hormones like estrogen, progesterone, and testosterone. The pancreas rounds out the list, though it pulls double duty (more on that below).
These glands are the body’s chemical messaging system. The pituitary, a pea-sized gland at the base of the brain, is sometimes called the “master gland” because its hormones direct the activity of most other endocrine glands. The adrenals produce stress hormones and help regulate blood pressure. The thyroid controls your metabolism. Despite their small size, endocrine glands influence nearly every process in your body.
Exocrine Glands: Where the Numbers Explode
Exocrine glands are far more numerous than endocrine glands, and they’re the reason a total count becomes impractical. Your body has between 2 and 4 million sweat glands distributed across nearly every patch of skin. The face and scalp are especially dense with sebaceous (oil-producing) glands, with the scalp and forehead packing 400 to 900 per square centimeter. Your mouth contains 800 to 1,000 minor salivary glands, each only 1 to 2 millimeters wide, scattered throughout the lining of your cheeks, lips, tongue, and palate, on top of the three pairs of major salivary glands you can actually feel (the parotid, submandibular, and sublingual).
Then there are goblet cells, single-celled glands found throughout the lining of your intestines, stomach, airways, and even the surface of your eyes. They produce the slippery mucus that protects these tissues. Because they’re individual cells woven into layers of tissue rather than distinct organs, nobody has a reliable count, but they number in the billions across the entire digestive and respiratory tracts.
Other notable exocrine glands include the mammary glands, lacrimal glands (which produce tears), ceruminous glands in your ear canals (which produce earwax), and the many small glands lining your stomach and intestines that release digestive acids and enzymes.
Glands That Do Both Jobs
A few organs blur the line between endocrine and exocrine. The pancreas is the classic example. It produces 1 to 4 liters of enzyme-rich digestive juice each day, released through ducts into the small intestine. That’s its exocrine job. At the same time, clusters of specialized cells within the pancreas make insulin and glucagon, hormones released directly into the bloodstream to regulate blood sugar. That’s its endocrine job. The liver, ovaries, testes, and kidneys also have dual roles to varying degrees.
Reproductive Glands
Beyond the gonads (ovaries and testes), both sexes have additional glands specific to their reproductive systems. In men, the prostate gland and seminal vesicles produce fluids that nourish and transport sperm. Bulbourethral glands secrete a small amount of lubricating fluid. In women, Bartholin’s glands near the vaginal opening provide lubrication, and the mammary glands in the breasts produce milk after childbirth. These are all exocrine glands, releasing their products through ducts.
New Glands Are Still Being Found
In 2020, researchers using advanced imaging reported what they described as a previously unrecognized pair of salivary glands near the connection of the nasal cavity and throat, which they named the tubarial glands. The finding generated significant debate. Critics pointed to the small study population, male-heavy sample, and the possibility that 19th-century anatomists had already described the same structures. Whether these qualify as truly “new” major salivary glands or a redescription of known tissue remains unresolved. It’s a useful reminder that even in a body studied for centuries, our map of glands isn’t fully settled.
A Practical Way to Think About It
If you’re looking for a number you can use in a school report or conversation, here’s a reasonable framework. The body has about 8 to 10 major endocrine glands, 3 pairs of major salivary glands, roughly 800 to 1,000 minor salivary glands, 2 to 4 million sweat glands, and countless sebaceous glands, goblet cells, and other microscopic glands lining your organs. The total number of distinct, named gland types is somewhere around 50 to 60 when you list every recognized structure. But the total number of individual glands, counting each tiny sweat pore and mucus-producing cell, reaches into the millions or billions.
The more specific question you ask, the more useful the answer becomes. “How many endocrine glands?” gives you about 10. “How many sweat glands?” gives you 2 to 4 million. “How many glands total?” gives you a number so large it loses practical meaning, which is exactly why anatomy textbooks organize glands by type and function rather than trying to tally them all up.