Endocrinology is a branch of medicine dealing with disorders of the endocrine system and its specific secretions called hormones.
Hormones are molecules that act as signals from one type of cells to another.
Most hormones reach their targets via the blood.
Although every organ system secretes and responds to hormones (including the brain, lungs, heart, intestine, skin, and the kidney), the clinical specialty of endocrinology focuses primarily on the endocrine organs, meaning the organs whose primary function is hormone secretion.
These organs include the pituitary, thyroid, adrenals, ovaries and testes, and pancreas.
Endocrine system The endocrine system is a control system of ductless glands that secrete chemical messengers called hormones that circulate within the body via the ... >
read more
Pituitary gland The pituitary gland, or hypophysis, is an endocrine gland about the size of a pea that sits in the small, bony cavity at the base of the brain. The ... >
read more
Hormone A hormone is a chemical messenger from one cell (or group of cells) to another. All multicellular organisms produce hormones including plants. The ... >
read more
Human physiology Human physiology is the science of the mechanical, physical, and biochemical functions of normal humans or human tissues or organs. The principal ... >
read more
Anterior pituitary The anterior pituitary (also called the adenohypophysis) comprises the anterior lobe of the pituitary gland and is part of the endocrine system. ... >
read more
Thyroid hormone The thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are tyrosine-based hormones produced by the thyroid gland. An important component in ... >
read more
Hypothalamus In mammals, the hypothalamus is a region of the brain located below the thalamus, forming the major portion of the ventral region of the diencephalon ... >
read more
Insulin-like growth factor The insulin-like growth factors (IGFs) are polypeptides with high sequence similarity to insulin. IGFs are part of a complex system that cells use to ... >
read more
Digestion Digestion is the process whereby a biological entity processes a substance, in order to chemically convert the substance into nutrients. Digestion ... >
read more
Human biology Human biology is an academic field of biology which focuses on humans; it is closely related to medicine, primate biology, and a number of other ... >
read more