What are secretions from ductless glands called?

Secretions from ductless glands are called hormones. Hormones are chemical messengers produced by endocrine glands that are released directly into the bloodstream. They regulate various physiological processes in the body, including growth, metabolism, reproduction, and mood. The term "ductless" emphasizes that these glands do not have ducts or tubes to transport their secretions; instead, their hormones diffuse directly into the circulatory system, allowing for widespread effects in distant target tissues.

The other options refer to substances that have different roles or characteristics. Enzymes are biological catalysts that speed up chemical reactions but are usually secreted by exocrine glands and are not ductless. Excretory fluids involve waste removal and are not produced exclusively by ductless glands. Digestive fluids are involved in breaking down food, primarily produced by the digestive system rather than hormonal regulation. Thus, the unique function and method of release make hormones the correct answer in this context.