Hormones

"Hormone" is also the NATO reporting name for the Soviet/Russian Kamov Ka-25 military helicopter. A hormone (from Greek horman - "to set in motion") is a chemical messenger from one cell (or group of cells) to another. All multicellular organisms produce hormones (including plants - see article phytohormone). The best-known animal hormones are those produced bi endocrine glands of vertebrate animals, but hormones are produced by nearly every organ system and tissue type in an animal body ...