Yes, the pancreas is a gland. It is actually both major types of gland at once, making it one of the few organs in the body that serves a dual role. It functions as an exocrine gland (releasing digestive enzymes into the small intestine) and as an endocrine gland (releasing hormones directly into the bloodstream).
Why the Pancreas Counts as Two Glands in One
A gland is any organ that produces and releases substances the body needs. Glands come in two varieties. Exocrine glands send their products through ducts to a specific destination, like sweat glands releasing sweat onto your skin. Endocrine glands skip the ducts entirely and release hormones straight into your blood, like the thyroid.
The pancreas does both. The vast majority of its tissue is dedicated to its exocrine job: manufacturing digestive enzymes and delivering them through a duct into the first section of the small intestine. Scattered throughout that exocrine tissue are tiny clusters of hormone-producing cells that handle the endocrine side. These two systems operate independently, each with its own cell types and its own delivery method, but they share the same organ.
The Exocrine Side: Digesting Your Food
Every time you eat, the pancreas releases a cocktail of digestive enzymes into your small intestine. These enzymes break down the three main components of food. Proteases (primarily trypsin and chymotrypsin) break proteins into smaller fragments your gut can absorb. Pancreatic lipase splits dietary fat into pieces small enough to cross the intestinal wall. Amylase breaks starch down into simple sugars. Beyond these three workhorses, the pancreas also produces enzymes that digest DNA, RNA, gelatin, and elastic tissue.
The pancreas doesn’t just send enzymes, though. Its duct cells also secrete an alkaline, bicarbonate-rich fluid. This fluid serves two purposes: it prevents the digestive enzymes from clumping together inside the pancreatic ducts, and it neutralizes the acidic contents arriving from the stomach. Without that neutralization, the acid would damage the lining of the small intestine and prevent enzymes from working properly.
All of this empties into the duodenum (the first stretch of small intestine) through the pancreatic duct. At its endpoint, the pancreatic duct merges with the common bile duct at a small junction called the ampulla of Vater. A set of circular muscles there controls when bile from the liver and enzymes from the pancreas get released, so both arrive together when food needs digesting.
The Endocrine Side: Controlling Blood Sugar
The hormone-producing cells of the pancreas are organized into tiny clusters called islets of Langerhans. Each islet contains several specialized cell types, but three matter most. Beta cells produce insulin, which lowers blood sugar by signaling cells throughout your body to absorb glucose. Alpha cells produce glucagon, which does the opposite, telling the liver to release stored glucose when blood sugar drops too low. Delta cells produce a third hormone, somatostatin, which acts locally to dial down the release of both insulin and glucagon, keeping the system in balance.
This hormonal balancing act runs constantly, adjusting blood sugar levels minute by minute. When the beta cells fail or the body stops responding to the insulin they produce, the result is diabetes. The American Diabetes Association now recommends antibody-based screening for people without symptoms but with a family history of type 1 diabetes, since the disease stems from immune destruction of those beta cells.
Where the Pancreas Sits in Your Body
The pancreas is tucked deep in the abdomen, behind the stomach. It sits in a retroperitoneal position, meaning it’s behind the membrane that lines the abdominal cavity rather than inside it. Its head, the widest part, nestles into the C-shaped curve of the duodenum on the right side of the abdomen. Its body and tail extend to the left, with the tail reaching toward the spleen. Part of the organ is sandwiched directly between the stomach and the spine, which is why pancreatic problems can sometimes cause back pain.
What Happens When Either Function Fails
Because the pancreas operates as two glands, it can fail in two distinct ways. On the exocrine side, a condition called exocrine pancreatic insufficiency (EPI) develops when the pancreas no longer produces enough enzymes for proper digestion. Food passes through the gut only partially broken down, leading to bloating, fatty stools, weight loss, and nutrient deficiencies. EPI most commonly develops in people with chronic pancreatitis. Estimates suggest that between 30% and 90% of people with chronic pancreatitis develop some degree of enzyme deficiency.
Pancreatitis itself, whether acute or chronic, is inflammation of the pancreas that disrupts both production lines. Acute pancreatitis often announces itself with severe upper abdominal pain. One way doctors confirm it is through a blood test measuring lipase, an enzyme that leaks into the bloodstream when pancreatic tissue is damaged. A normal lipase level falls between 0 and 160 units per liter. A reading three or more times above the upper limit points toward acute pancreatitis.
On the endocrine side, failure of the insulin-producing beta cells leads to type 1 diabetes, while reduced sensitivity to insulin (often alongside declining insulin production) leads to type 2 diabetes. These are among the most common chronic diseases worldwide, and they trace directly back to the pancreas’s role as an endocrine gland.
Why It Matters That the Pancreas Is Both
The dual nature of the pancreas explains why diseases affecting it can look so different from one another. A person with EPI has a digestive problem. A person with type 1 diabetes has a hormonal problem. Both originate in the same organ, but in entirely different cell populations doing entirely different jobs. It also explains why severe or prolonged pancreatic damage, like chronic pancreatitis or pancreatic cancer, can eventually cause problems on both fronts: poor digestion and unstable blood sugar at the same time.