Assertion: endocrine gland's hormone | /r/HasProperty | substance
Facets:
Source sentences:
text: Endocrine system, any of the systems found in animals for the production of hormones, substances that regulate the functioning of the organism.
text: In addition to the well-defined hormones, other substances, which are found in blood and in tissues and are of uncertain function, may be concerned in various ways with physiological regulation in vertebrates, although their hormonal status has not yet been established.