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A hormone is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target ...

What Are Hormones and What Do They Do? | Hormone Health


Hormones are special chemical messengers in the body that are created in the endocrine glands. These messengers control most major bodily functions, from ...

What are Hormones? - News Medical


Dec 2, 2013 ... Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their ...

Hormone definition - MedicineNet - Health and Medical Information ...


Hormone: A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special ...

How Do Hormones Work? | Fooling With Nature | FRONTLINE | PBS


Hormones are chemical messengers that travel throughout the body coordinating complex processes like growth, metabolism, and fertility. They can influence ...

For Women > Menopause and Hormones: Common Questions - FDA


Sep 28, 2015 ... During menopause a woman's body slowly produces less of the hormones estrogen and progesterone. This often happens between ages 45 ...

You & Your Hormones | Glands | Thyroid gland


Jan 14, 2015 ... The thyroid gland is part of the endocrine system and is responsible for producing and releasing thyroid hormones into the bloodstream.

Feeling Hormonal? - WebMD


Hey, we all are. Hormones control just about every aspect of our physical and mental health — and when they go off-kilter, they can trigger anything from acne  ...

You & Your Hormones | Glands | Hypothalamus


The hypothalamus is a part of the brain that has a vital role in controlling many bodily functions including the release of hormones from the pituitary gland.

You & Your Hormones | Glands | Adrenal glands


Jan 15, 2015 ... The adrenal glands are small structures attached to the top of each kidney. The human body has two adrenal glands that release chemicals ...

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Hormones: MedlinePlus


Hormones are your body's chemical messengers. They affect many processes including mood. Too much or too little of a certain hormone can be serious.

Definition: Hormones - KidsHealth


Hormones are chemical substances that act like messenger molecules in the body.

What Are Hormones - eNotes.com


Hormones are like messengers in your body that give orders to your cells to do particular things. They are chemicals that are manufactured by glands and ...