Endocrine glands are specialized organs in the body that produce and release hormones into the bloodstream. These hormones serve as chemical messengers, regulating various physiological functions and maintaining homeostasis. The endocrine system plays a crucial role in coordinating and controlling processes such as metabolism, growth and development, immune function, and response to stress.

Unit 2,

Reference: Oxford Concise Medical Dictionary (9th ed) Oxford University Press 2015 ISBN-13: 9780199687817, p628