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  1. Hormone - Wikipedia

    Hormones are required for the normal development of animals, plants and fungi. Due to the broad definition of a hormone (as a signaling molecule that exerts its effects far from its site of production), …

  2. Hormones: What They Are, Function & Types - Cleveland Clinic

    What are hormones? Hormones are chemicals that coordinate different functions in your body by carrying messages through your blood to your organs, skin, muscles and other tissues. These …

  3. Hormones and the Endocrine System - Johns Hopkins Medicine

    The endocrine system uses hormones to control and coordinate your body's internal metabolism (or homeostasis) energy level, reproduction, growth and development, and response to injury, stress, …

  4. Hormone | Definition, Function, & Types | Britannica

    A hormone is an organic substance secreted by plants and animals that functions in the regulation of physiological activities and in maintaining homeostasis. Hormones carry out their functions by …

  5. What are hormones? Types, functions, and imbalances

    Jun 26, 2024 · Hormones are chemical messengers that send a signal to one or more tissues or organs in the body. They are part of the endocrine system, and the study of this system is known as …

  6. Hormones - Definition, Function, Sources, and Regulation

    Oct 21, 2025 · Hormones are signaling molecules secreted by endocrine organs that regulate physiological processes in target cells. They control growth, development, metabolism, reproduction, …

  7. What Is a Hormone? - National Institute of General Medical Sciences

    Jul 17, 2024 · Hormones are chemical messengers in the body that glands form and release, or secrete, into the bloodstream, where they travel to various organs and tissues to change biological functions.

  8. Hormones | Endocrine Glands | MedlinePlus

    Jun 28, 2025 · Hormones are your body's chemical messengers. They affect many processes including mood. Too much or too little of a certain hormone can have health implications.

  9. What Is a Hormone? - Baptist Health

    5 days ago · Learn what hormones are, how they work, and the signs of imbalance. Understand the body’s chemical messengers and when to talk with a healthcare provider.

  10. What are Hormones? - News-Medical.net

    Mar 19, 2025 · Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions.