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
... > full story
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
... > full story

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
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
... > full story
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Pregnancy and Childbirth
Tracheotomy
A tracheotomy or tracheostomy is a surgical procedure performed on the neck to open a direct airway through an incision in the trachea (the ... > 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 anterior pituitary secretes growth hormone, ... > 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. Under the influence of the hypothalamus, the anterior ... > more -
Amyotrophic Lateral Sclerosis
Healthy Aging
Attention Deficit Disorder
Sports Medicine
Thyroid Disease
Life Sciences
Vocal folds
The vocal folds, also known popularly as vocal cords, are composed of twin infoldings of mucous membrane stretched horizontally across the larynx. They vibrate, modulating the flow of air being ... > 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
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