Chemical substances having a specific regulatory effect on the activity of a certain organ or organs. The term was originally applied to substances secreted by various ENDOCRINE GLANDS and transported in the bloodstream to the target organs. It is sometimes extended to include those substances that are not produced by the endocrine glands but that have similar effects.
Subject headings from Medical Subject Headings (MeSH) 2026, courtesy of the U.S. National Library of Medicine. ScieBeta is not affiliated with, nor endorsed by, the NLM or the NIH. Resources are linked from their original providers and open directly from them. Licence and credit are shown alongside every item.