It is a small structure in the head. Any of the lingual salivary glands in the circumvallate papillae. For example, the thyroid gland. b. It is called the master gland because it produces hormones that control other glands and many body functions including growth. There are two main groups of glands: (1) The. In warm-blooded animals, no effects are known. An excess of parathormone results in hyperparathyroidism; a deficiency, in hypoparathyroidism, with neuromuscular hyperexcitability manifested by carpopedal spasm, wheezing, muscle cramps, urinary frequency, mood changes, and lassitude. gland. Benign prostatic hyperplasia (BPH) — also called prostate gland enlargement — is a common condition as men get older. Any of two kinds of glands that secrete into the follicles of eyelashes: ciliary sweat glands and ciliary sebaceous glands. The pituitary consists of the anterior and posterior pituitary.. Organized aggregation of cells functioning as a secretory or excretory organ. See: aldosterone; cortisol; steroid, Hypersecretion of adrenal cortical hormones results in Cushing syndrome. A gland, such as a sebaceous gland of the skin, in which the secretory cells release intracellular macromolecules by disintegration of their cell membranes; these cells then die. If you have a sleep disorder, it could be a sign that your pineal gland is … Pituitary gland: The main endocrine gland. See more. The three catecholamines are also produced in other parts of the body. Adrenal Glands Definition The adrenal glands are two separate glands located on the surface of the renal excretion apparatus. A common example is the goblet (chalice, calceiform) cell, a unicellular mucous-secreting gland found in the columnar epithelium of the intestinal tract. Endocrine gland definition, any of various glands, as the thyroid, adrenal, and pituitary glands, that secrete certain substances or hormones directly into the blood or lymph; ductless gland. pituitary gland n. A small oval endocrine gland attached to the base of the vertebrate brain and consisting of an anterior and a posterior lobe, the secretions of which control the other endocrine glands and influence growth, metabolism, and maturation. Any of the glands near the oral cavity that secrete saliva. There are numerous minor salivary glands in the oral cavity, named according to their locations: lingual, sublingual, palatal, buccal, labial, and glossopharyngeal. Sweat glands are most numerous on the palms of the hands and soles of the feet. See: An oil-secreting gland of the skin. Numerous minor sublingual glands are scattered throughout the mucosa under the tongue, each with its own duct to the oral surface. Any of the skin glands that regulate body heat by secreting sweat. For example, the thyroid gland. Small secretory and apocrine glands adjacent to follicles of eyelashes. The gland in the male that surrounds the neck of the bladder and the urethra. Hypothyroidism (underactive thyroid) is a condition in which your thyroid gland doesn't produce enough of certain crucial hormones.Hypothyroidism may not cause noticeable symptoms in the early stages. noun. The largest of the salivary glands, located below the ear and inside the ramus of the mandible. CONTINUE SCROLLING OR CLICK HERE FOR RELATED SLIDESHOW Medical Author: William C. Shiel Jr., MD, FACP, FACR; home > gland Gland: A group of cells that secrete a substance for use in the body. Classification of glands according to mode of secretion. It is the sensitive bulbous structure at the end of the human penis, and is anatomically homologous to the clitoral glans of the human female. Slippery Words Quiz—Changing with the Times. The gland that secretes tears. Gland definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Medical Definition of exocrine gland. Glands are divided into two main groups, endocrine and exocrine. Any of the glands in the olfactory mucous membranes. Glands are divided into two main … Posterior lobe: Hormones are secreted by the neurosecretory cells of the hypothalamus and pass through fibers of the supraopticohypophyseal tracts in the infundibular stalk to the neurohypophysis, where they are stored. One of two broad categories of glands; endocrine glands are the complementary category. adj.. A daily challenge for crossword fanatics. Saliva lubricates food and makes it easier to taste, chew, and swallow. (Anatomy) a structure, such as a lymph node, that resembles a gland in form 3. : either of two oval racemose glands lying one to each side of the lower part of the vagina and secreting a lubricating mucus. Medical Definition of Bartholin's gland. The thyroid is filled with capillary networks (supplied by the superior and inferior thyroid arteries) that surround the many spherical units (follicles) packed inside the gland. Any of the mixed glands lying in the submucosa of the bronchi and bronchial tubes. The salivary glands can become inflamed, as in Sjogren's syndrome and mumps. The prostate consists of a median lobe and two lateral lobes measuring about 2 × 4 × 3 cm and weighing about 20 g; it is enclosed in a fibrous capsule containing smooth muscle fiber in its inner layer. Epinephrine constricts vessels in the skin and viscera, dilates vessels in skeletal muscle, increases heart rate, dilates the bronchi by relaxing bronchial smooth muscle, increases the conversion of glycogen to glucose in the liver to increase the blood glucose level, and diminishes activity of the gastrointestinal system. QUESTION What causes tooth decay? The pituitary consists of the anterior and posterior pituitary. Any of the tubular glands in the endometrium. Any of the lymph nodes in the arm and forearm. Their lipid-rich secretions coat the shafts of lashes. Many thanks. Histomorphological spectrum of salivary gland tumors in a tertiary care hospital--A retrospective study, Outer portion of gland on top of each kidney, Cortisol regulates carbohydrate and fat metabolism; aldosterone regulates salt and water balance, Hyperfunction: Adrenogenital syndrome; Cushing syndrome, Inner portion of adrenal gland; surrounded by adrenal cortex, Effects of epinephrine and norepinephrine mimic those of sympathetic nervous system; increases carbohydrate use for energy, Abdominal cavity; head adjacent to duodenum; tail close to spleen and kidney, Secretes insulin and glucagon, which regulate carbohydrate metabolism, Hyperfunction: If a tumor produces excess insulin, hypoglycemia, Four or more small glands on back of thyroid, Parathyroid hormone regulates calcium and phosphorus metabolism; indirectly affects muscular irritability, Hyperfunction: Hypercalcemia; resorption of bone; kidney stones; nausea; vomiting; altered mental status, Front portion of small gland below hypothalamus, Influences growth, sexual development, skin pigmentation, thyroid function, adrenocortical function through effects on other endocrine glands (except for growth hormone, which acts directly on cells), Hypofunction: Dwarfism in child; decrease in all other endocrine gland functions except parathyroids, Hyperfunction: Acromegaly in adult; giantism in child, Back portion of small gland below hypothalamus, Antidiuretic hormone increases absorption of water by kidney tubule, Testosterone and estrogen regulate sexual maturation and development of secondary sex characteristics; some effects on growth, Hypofunction: Lack of sex development or regression in adult, Hypofunction: Cretinism in young; myxedema in adult; goiter. An aggregation of cells which secretes or excretes a substance. Thyroid follicles consist of a ring of follicular cells surrounding a space filled with a clear colloid (a mixture of thyroglobulin proteins and iodine), from which the thyroid hormones (thyroxine and related molecules) are synthesized. Definition of Salivary gland. Treatment with syntheti… These hormones regulate the rate of cellular metabolism throughout the body. The pituitary is an endocrine gland secreting a number of hormones that regulate many bodily processes including growth, reproduction, and other metabolic activities. Any of the sweat glands in the axillae and pubic region that open into hair follicles rather than directly onto the surface of the skin as do eccrine sweat glands. Nglish: Translation of gland for Spanish Speakers, Britannica English: Translation of gland for Arabic Speakers, Britannica.com: Encyclopedia article about gland. In women, luteinizing hormone (LH) stimulates ovulation and formation of the corpus luteum and its secretion of estrogen and progesterone. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Medical definition of gland of Moll: any of the small glands near the free margin of each eyelid regarded as modified sweat glands —called also Moll's gland. Any of the glands in the skin that secrete perspiration. In addition, chromaffin and other neuroendocrine cells are found individually and in small clusters throughout the body. an aggregation of cells specialized to secrete or excrete materials not related to their ordinary metabolic needs. adj., adjglan´dular. A gland composed of numerous tubules leading to a lone duct. How to use a word that (literally) drives some pe... Do you know these earlier meanings of words? The anterior pituitary is the front portion of the pituitary. Glands: The relationship of the hair follicle, eccrine and apocrine sweat glands and sebaceous glands. Over time, untreated hypothyroidism can cause a number of health problems, such as obesity, joint pain, infertility and heart disease.Accurate thyroid function tests are available to diagnose hypothyroidism. Look it up now! Any of the mixed exocrine glands that form the epithelial pockets (pits) in the lining of the stomach; the glands are named for their location, e.g., cardiac glands, fundic glands, pyloric glands. Privacy & Trust Info Adrenal gland: A small gland located on top of the kidney. They appear after puberty and are more developed in women than in men. Anticipatory states tend to bring about the release of norepinephrine. The gland is composed of two lobes, one on each side of the trachea, and an isthmus of tissue connecting the lower two thirds of each lobe. Its main duct (Wharton duct) opens at the side of the frenulum linguae. — called also gland of Bartholin, greater vestibular gland. the sebaceous and sudoriferous glands. Any of the glands exuding odoriferous materials, as those around the prepuce or anus. The adrenal medulla is controlled by the sympathetic nervous system and functions in conjunction with it. Accessed 22 Jan. 2021. The primary action of norepinephrine is constriction of the arterioles and venules, resulting in increased resistance to blood flow, elevated blood pressure, and slowing of the heart. A small, gray, rounded gland that develops from ingrown oral epithelium (Rathke pouch) and is attached to the lower surface of the hypothalamus by the infundibular stalk. The cells are arranged in cords. Medical Definition of Thyroid gland Medical Author: William C. Shiel Jr., MD, FACP, FACR Thyroid gland: A gland that makes and stores hormones that help regulate the heart rate, blood pressure , body temperature, and the rate at which food is converted into energy. — called also gland of external secretion. Delivered to your inbox! Meibomian gland dysfunction: what are we looking at? Most sweat glands are merocrine; those of the axilla, areola, mammary gland, labia majora, and circumanal region are apocrine. A mixed tubuloalveolar salivary gland about the size of a walnut that lies below the posterior floor of the mouth, medial to the body of the mandible. Adrenocortical insufficiency may be acute or chronic; acute insufficiency of adrenal hormones produces circulatory shock, while chronic insufficiency results in Addison disease. An exocrine gland with a relatively watery secretion, isotonic with blood plasma, and containing enzymes, glycoproteins, lysozymes, and bactericides. The isthmus is usually located at the level of the second to third tracheal rings. Each adrenal gland is a two-part organ composed of an outer cortex and an inner medulla. Endocrine glands, e.g., the thyroid gland, are ductless glands that secrete macromolecules, called hormones, directly into the bloodstream, and such glands are richly supplied by blood capillaries. Any of various organs, such as lymph nodes, that resemble true glands but perform a nonsecretory function. Hyposecretion of anterior lobe causes dwarfism, pituitary cachexia (Simmonds disease), Sheehan syndrome, acromicria, eunuchoidism, or hypogonadism. https://medical-dictionary.thefreedictionary.com/gland. From Copstead, 1995. Anterior lobe: Secretions here are the somatotropic, or growth hormone (STH or GH), which regulates cell division and protein synthesis for growth; adrenocorticotropic hormone (ACTH), which regulates functional activity of the adrenal cortex; thyrotropic hormone (TTH or TSH), which regulates functional activity of the thyroid gland; and prolactin, also called lactogenic hormone, which induces secretion of milk in the adult female. It is a tubuloalveolar gland located in the orbit, superior and lateral to the eyeball, and consists of a large superior portion (pars orbitalis) and a smaller inferior portion (pars palpebralis). A lone secretory epithelial cell, often found in the midst of nonsecretory cells. See: A multicellular gland in which the cells secrete specific molecules into an oval or flask-shaped sac. Synonym: Any of the glands secreting a fluid containing albumin. 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