Glands that release their secretions into ducts rather than into the blood are called glands.

Glands that release their secretions into ducts rather than directly into the bloodstream are called exocrine glands. These glands are specialized organs that produce substances like enzymes, sweat, saliva, and mucous, which are then transported through ducts to specific sites of action.

Exocrine glands play a crucial role in various physiological processes. For example, sweat glands help in thermoregulation by releasing sweat onto the skin's surface, which cools the body through evaporation. Similarly, salivary glands contribute to digestion by secreting saliva into the mouth to help break down food.

Unlike endocrine glands, which release hormones directly into the bloodstream to regulate various functions throughout the body, exocrine glands have a localized effect, directly impacting specific target areas through their ducts. This distinction is vital for understanding both glandular function and the systemic effects of hormones versus localized secretions.