Glandular secretion is the release of hormones from glands in the body. Hormones are chemical messengers that help regulate various bodily functions, such as metabolism, growth, and reproduction. The term 'HORMONE' is derived from the Greek word 'hormao, ' which means to excite or arouse. Hormones are released by endocrine glands, such as the pituitary, thyroid, and adrenal glands. These hormones travel through the bloodstream and affect cells in other parts of the body.