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

    Dec 26, 2025 · 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 …

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

    Hormones are chemical messengers that coordinate different functions in your body. Several glands, organs and tissues make and release hormones, many of which make up your endocrine system. …

  3. 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), …

  4. HORMONAL Definition & Meaning - Merriam-Webster

    The meaning of HORMONAL is of, relating to, utilizing, or produced by hormones. How to use hormonal in a sentence.

  5. 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.

  6. What Do Hormones Do in Children, Men, and Women?

    Dec 28, 2025 · Hormones serve as chemical messengers in the body and regulate functions like growth and metabolism. Adrenal hormones affect stress response, cardiovascular health, and energy use. …

  7. What to know about hormones - UnitedHealthcare

    Hormones are chemicals made by glands in your endocrine system that travel through your bloodstream, delivering important instructions to your organs and tissues. They help regulate …