Endocrine System

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A gland is a group of secretory tissues. Exocrine glands release their secretions through ducts into a target organ, such as salivary glands. Endocrine glands are ductless glands and release hormones …

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A hormone is a chemical messenger released by an endocrine gland directly into the blood. It travels to a target organ and controls a specific body function. Hormones are produced in very small quanti…

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The term hormone was coined by Starling. Thomas Addison is called the Father of Endocrinology. Addison's disease is named after his description of adrenal cortex hyposecretion.

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The endocrine system coordinates the activities of different organ systems through hormones. These hormones control growth, reproduction, metabolism, and water balance. Because they act on many organs…

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Both systems coordinate and control body activities. The nervous system sends messages quickly through nerves and acts on specific organs, so its effects are rapid and short-lived. The endocrine syste…

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The pituitary gland, also called hypophysis, is a whitish pea-sized gland weighing about 5 g. It hangs from the base of the hypothalamus by the infundibulum. It has anterior, middle, and posterior lob…

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The hypothalamus controls the release of tropic hormones from the pituitary through releasing hormones. For example, TSH-releasing hormone from the hypothalamus controls the release of TSH from the pi…

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Tropic hormones are hormones that stimulate other endocrine glands to secrete their hormones. The main tropic hormones of the anterior pituitary are TSH, ACTH, FSH, and LH.