Which type of gland secretes enzymes and other substances through ducts?

The correct answer is exocrine glands. These glands are responsible for producing and releasing substances through ducts to specific locations. Common examples include salivary glands, sweat glands, and digestive glands, which secrete enzymes, sweat, or other fluids directly to the epithelial surfaces or into body cavities via ducts. This direct and localized secretion differentiates exocrine glands from other types, such as endocrine glands, which release hormones directly into the bloodstream without ducts, influencing distant organs or tissues.

Understanding the mechanisms and functions of various gland types is essential in veterinary medicine, as it helps in the diagnosis and treatment of many conditions related to secretion and hormone regulation.