Which type of glands have ducts?

Exocrine glands are characterized by their use of ducts to transport secretions to specific sites in the body. These glands secrete their products directly into ducts that lead to external surfaces or into cavity systems that open to the external environment. Examples of exocrine glands include sweat glands, salivary glands, and glands in the digestive system, which all utilize ducts to deliver their substances.

In contrast, endocrine glands lack ducts and secrete hormones directly into the bloodstream or surrounding tissues. This difference in mechanism is crucial for the distinct functions of these gland types; exocrine glands focus on local and immediate effects through their duct systems, while endocrine glands have a broader and more systemic impact through the circulatory system. Understanding this distinction is key in physiology as it affects how substances are regulated and utilized in the body.