Glands that secrete substances through ducts to the outside of the body are called

• A. Endocrine glands
• B. Exocrine glands
• C. Glands that secrete hormones
• D. Adrenal glands

Answer: (B)

Glands that release their products through ducts to the outside of the body are exocrine glands. The defining feature is the duct system that carries secretions to a surface or cavity, such as sweat glands on the skin or salivary glands in the mouth. Endocrine glands, on the other hand, lack ducts and release hormones directly into the bloodstream to reach distant targets. An adrenal gland is an example of an endocrine gland because it secretes hormones into the blood rather than through ducts.