exócrina

Exocrine refers to glands that secrete substances onto an epithelial surface, either directly or through a duct. These secretions are typically external to the body or into a lumen, such as the digestive tract. Exocrine glands play a vital role in various bodily functions, including digestion, lubrication, and protection. Examples of exocrine glands include sweat glands, salivary glands, mammary glands, and glands in the digestive system like the pancreas and liver.

The secretions of exocrine glands are diverse and can include water, electrolytes, mucus, enzymes, and lipids. The composition and function of these secretions depend on the specific gland. For instance, salivary glands produce saliva, which aids in digestion and lubrication of food. Sweat glands produce sweat, which helps regulate body temperature and excrete waste products. The pancreas, in addition to its endocrine function, secretes digestive enzymes into the small intestine to break down carbohydrates, proteins, and fats.

In contrast to endocrine glands, which release hormones directly into the bloodstream to act on distant target cells, exocrine glands deliver their secretions locally or to specific external environments. This distinction is fundamental to understanding the diverse roles of glandular tissue in maintaining homeostasis and facilitating physiological processes. The careful regulation of exocrine secretions is crucial for health, and disruptions can lead to various medical conditions.