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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 bloodstream to
affect distant organs.
Hormones act as
... > full story
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 anterior
pituitary secretes growth
hormone, prolactin,
... > full story
Anterior pituitary
The anterior pituitary (also
called the adenohypophysis)
comprises the anterior lobe
of the pituitary gland and
is part of the endocrine
system. Under the influence
of the hypothalamus, the
anterior pituitary produces
... > full story
Hormone
A hormone is a chemical
messenger from one cell (or
group of cells) to another.
All multicellular organisms
produce hormones including
plants. The best-known
animal (and human) hormones
are those produced by
... > full story
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Endocrinology
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 ... > more -
Hormone Disorders
Thyroid Disease
Molecular Biology
Healthy Aging
Attention Deficit Disorder
Cell Biology
Thyroid hormone
The thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are tyrosine-based hormones produced by the thyroid gland. An important component in the synthesis is iodine. The thyronines act on the ... > more -
Thyroid Disease
Hormone Disorders
Healthy Aging
Attention Deficit Disorder
Sports Medicine
Pregnancy and Childbirth
Hypothyroidism
Hypothyroidism is the disease state caused by insufficient production of thyroid hormone by the thyroid gland. There are several distinct causes for chronic hypothyroidism, the most common being ... > more -
Healthy Aging
Teen Health
Hormone Disorders
Attention Deficit Disorder
Children's Health
Pregnancy and Childbirth
Delayed puberty
Puberty is described as delayed when a boy or girl has passed the usual age of onset of puberty with no physical or hormonal signs that it is beginning. Puberty may be delayed for several years and ... > more -
Growth hormone
Growth hormone is a polypeptide hormone synthesised and secreted by the anterior pituitary gland which stimulates growth and cell reproduction in humans and other vertebrate ... > 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 communicate with their physiologic environment. ... > more -
Progesterone
Progesterone is a C-21 steroid hormone involved in the female menstrual cycle, pregnancy (supports gestation) and embryogenesis of humans and other species. Progesterone belongs to a class of ... > more -
Testosterone
Testosterone is a steroid hormone from the androgen group. Testosterone is secreted in the testes of men and the ovaries of women. It is the principal male sex hormone and the "original" anabolic ... > more -
Thyroid Disease
Hormone Disorders
Healthy Aging
Attention Deficit Disorder
Sports Medicine
Diseases and Conditions
Hyperthyroidism
Hyperthyroidism (or "overactive thyroid gland") is the clinical syndrome caused by an excess of circulating free thyroxine (T4) or free triiodothyronine (T3), or both. Major clinical features in ... > more
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