CONTINUE SCROLLING OR CLICK HERE FOR RELATED SLIDESHOW 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. 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. In an adult, the average weight of an adrenal gland is 5 g (range: 4 to 14 g). Any of the six large salivary glands; the two parotids, the two sublinguals, and the two submandibulars. no other symptoms. 'Nip it in the butt' or 'Nip it in the bud'. Any of the tiny glands located below the margin of the vocal cords. Hormones are secreted in the following lobes: Intermediate lobe: In cold-blooded animals, intermedin is secreted, influencing the activity of pigment cells (chromatophores) of fishes, amphibians, and reptiles. Sweat glands are most numerous on the palms of the hands and soles of the feet. A daily challenge for crossword fanatics. Pituitary gland: The main endocrine gland.It is a small structure in the head. It is the site of melatonin synthesis, which is inhibited by light striking the retina. Test your visual vocabulary with our 10-question challenge! Any of the alveolar glands found in the uppermost portion of the vaginal mucosa near the cervix, most of the vaginal mucosa being devoid of glands. See also exocrine gland, endocrine gland 2. b. Any of the mixed serous and mucus glands in the submucosa of the laryngeal section of the respiratory tract. Any gland affected by the action or secretion of another gland, e.g., the thyroid is a target gland of the pituitary. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! 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. 2. See: An endocrine gland in the brain, shaped like a pine cone and located in a pocket near the splenium of the corpus callosum. If you have a sleep disorder, it could be a sign that your pineal gland is … The adrenal medulla is controlled by the sympathetic nervous system and functions in conjunction with it. Any of the glands of the vaginal vestibule. The cortex synthesizes three groups of steroid hormones from cholesterol. Any of the glands in the skin that secrete perspiration. Small sebaceous glands surrounding the follicles of eyelashes. Any of the glands in the esophageal mucosa. 1 : a cell, group of cells, or organ of endothelial origin that selectively removes materials from the blood, concentrates or alters them, and secretes them for further use in the body or for elimination from the body. A compound alveolar gland that secretes milk. A gland with cells that secrete specific molecules into the adjacent interstitial space (paracrine glands) or into the blood stream (endocrine glands). 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. Exocrine glands, e.g., the salivary glands, secrete specific molecules either onto the outer surface of the body or into a duct that empties onto surfaces that connect to the outer surface of the body. 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. I have Fibromyalgia and I read that if your diagnosed with this you can have Thyroid problems also. Any of the hundreds of 1 to 2 mm diameter mucous-secreting salivary glands distributed throughout the oral submucosa. The medulla arises from ectoderm, which also gives rise to the sympathetic nervous system. Most sweat glands are merocrine; those of the axilla, areola, mammary gland, labia majora, and circumanal region are apocrine. Synonym: Any of the glands secreting a fluid containing albumin. Another class of thyroid cells, the parafollicular or C cells, is found outside the follicles; C cells secrete calcitonin, a calcium-lowering hormone. This adrenal gland is often also referred to by another name, the suprarenal gland. An aggregation of cells which secretes or excretes a substance. — called also gland of external secretion. Anticipatory states tend to bring about the release of norepinephrine. The blood supply is from branches of the external carotid artery. A simple tubular sweat gland of the skin. The entire gland is enclosed in a tough connective tissue capsule from which trabeculae extend into the cortex. “Gland.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gland. From Copstead, 1995. sentinel gland an enlarged lymph node, considered to be pathognomonic of some pathologic condition elsewhere. From Applegate, 2000. 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. How to use a word that (literally) drives some pe... Do you know these earlier meanings of words? A common example is the goblet (chalice, calceiform) cell, a unicellular mucous-secreting gland found in the columnar epithelium of the intestinal tract. A gastric gland in the cardiac region of the stomach. Any of the gastric glands found in the fundus and body of the gastric mucosa. Look it up now! A term formerly used to indicate a sentinel lymph node, i.e., a lymph node that first alerts a clinician to serious pathology (such as a spreading cancer). Hypersecretion of aldosterone results in a surgically correctable form of hypertension (aldosteronism). Any of the tubular glands in the endometrium. The adrenal glands produce hormones that help control heart rate, blood pressure, the way the body uses food, the levels of minerals such as sodium and potassium in the blood, and other functions particularly involved in … Its main duct opens into or near the submandibular duct, but several smaller ducts may open to the oral cavity independently along the sublingual fold. The glans penis may be smooth, spiny, elongated, or divided in other mammals. For example, the thyroid gland. Any of the small masses of lymphatic tissue in the lamina propria of the pyloric region of the stomach. It can also cause bladder, urinary tract or kidney problems.There are several effective treatments for prostate gland enlargement, including medications, minimally invasive th… Also called hypophysis, pituitary body. The pituitary consists of the anterior and posterior pituitary. The largest of the salivary glands, located below the ear and inside the ramus of the mandible. There are over 400 per square centimeter on the palms and about 80 per square centimeter on the thighs. A gastric gland in the pyloric region of the stomach. When the sac is cylindrical, the gland is called simple tubular; when the sac is flask-shaped, the gland is called simple alveolar. an aggregation of cells specialized to secrete or excrete materials not related to their ordinary metabolic needs. French glande, from Old French, glandular swelling on the neck, gland, ultimately from Latin gland-, glans acorn; akin to Greek balanos acorn. The cortex consists of cells arranged into three zones: the outer zona glomerulosa, the middle zona fasciculata, and the inner zona reticularis. Any of two kinds of glands that secrete into the follicles of eyelashes: ciliary sweat glands and ciliary sebaceous glands. It is often referred to as the “master gland of the body.”. The characteristic odor of perspiration is produced by the action of bacteria on the material secreted by the apocrine sweat glands. The dilatations of the ducts form reservoirs for the milk during lactation. Read medical definition of Pituitary gland. : a gland (as a sweat gland, a salivary gland, or a kidney) that releases a secretion external to or at the surface of an organ by means of a canal or duct. the sebaceous and sudoriferous glands. 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. The anterior pituitary is the front portion of the pituitary. 'All Intensive Purposes' or 'All Intents and Purposes'? Adrenal itself comes from the Latin term “ ad renes “, which means to be near the kidneys. Osteitis fibrosa cystica is associated with hyperplasia and resulting hypersecretion of the parathyroids. Medical Definition of exocrine gland. The two adrenal glands are retroperitoneal, each embedded in perirenal fat above its respective kidney. An exocrine gland with a relatively watery secretion, isotonic with blood plasma, and containing enzymes, glycoproteins, lysozymes, and bactericides. Any of the alveolar glands of the mucosa of the lips. The adrenal medulla synthesizes and stores three catecholamines: dopamine, norepinephrine, and epinephrine. See: Any of the small scattered mucous-secreting exocrine glands in the submucosa of the esophagus. The pituitary is an endocrine gland secreting a number of hormones that regulate many bodily processes including growth, reproduction, and other metabolic activities. For example, the thyroid gland. They include the minor vestibular glands and the major vestibular glands (Bartholin glands). 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. See: hormone. At this point the behavior of the stem cells changed, and new cells only emerged when mature sebaceous, Anatomy and histology of rodent and human major salivary glands-Overview of the Japan Salivary, Kapadnis, "Histomorphologic study on sweat, Wozniak et al., "The activity of selected glycosidases in salivary, Breastfeeding is performed via the mammary, The most common site of occurrence for both benign and malignant tumors was the parotid, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, Bartholin gland Bartholin, Caspar (the younger), the webmaster's page for free fun content, Stem Cell Research Sheds Light On How Skin's Sebaceous Glands Develop, Immunohistochemical Expression of Transforming Growth Factor-Alpha between Rat Submandibular and Sublingual Salivary Glands during Post-Natal Development, ROLE OF FINE NEEDLE ASPIRATION CYTOLOGY IN DIAGNOSIS OF SALIVARY GLAND LESIONS, COMPARATIVE ANATOMY AND MOLECULAR MECHANISMS INVOLVED IN RODENT SALIVARY GLAND DEVELOPMENT, Dissection of silk glands in the Western black widow Latrodectus Hesperus, Histomorphometrical Study on Regional Variation in Distribution of Sweat Glands in Buffalo Skin, Lysosomal Exoglycosidase Profile and Secretory Function in the Salivary Glands of Rats with Streptozotocin-Induced Diabetes, The pineal gland and higher consciousness, Mammary gland morphology in the northern Amazon red squirrel (Sciurus igniventris)/Morfologia da glandula mamaria em esquilo do Norte Amazonico (Sciurus igniventris), Bilateral hyperplasia of Bartholin's gland: A case report. Any of the dilated mucous glands in the uterine cervix. The pituitary gland is a small structure that affects many areas of your body and overall health. The gland in the head of the faucet prevents water from leaking up the shaft when the faucet is turned on. Many thanks. Gland: A group of cells that secrete a substance for use in the body. 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. Definition of Salivary gland. Recall the medical terms for the hardening and softening of glands Identify the terms for a diseased gland and the procedure used to remove it To unlock this lesson you must be a Study.com Member. Blood calcium falls and blood phosphorus rises. Hyperparathyroidism or hypersecretion results in a rise in blood calcium and fall in blood phosphorus. Any of the glands in the external auditory canal that secrete cerumen. Any of the mixed glands lying in the submucosa of the bronchi and bronchial tubes. Pineal gland, also called conarium, epiphysis cerebri, pineal organ, or pineal body, endocrine gland found in vertebrates that is the source of melatonin, a hormone derived from tryptophan that plays a central role in the regulation of circadian rhythm (the roughly 24-hour cycle of biological activities associated with natural periods of light and darkness). Secretions here are oxytocin, which acts specifically on smooth muscle of the uterus, increasing tone and contractility, and antidiuretic hormone (ADH), which increases reabsorption of water by the kidney tubules. Glands: The relationship of the hair follicle, eccrine and apocrine sweat glands and sebaceous glands. Any of the lymph nodes in the arm and forearm. Hypersecretion of anterior lobe causes gigantism, acromegaly, and pituitary basophilism (Cushing disease). The lobes of the thyroid lie under the sternothyroid and sternohyoid muscles. These hormones regulate the rate of cellular metabolism throughout the body. Calcium is removed from bones, resulting in increased fragility. Gland definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. adj.. Both the neural and the hormonal signals to the endocrine system are ultimately regulated by the hypothalamus of the brain, which is the integration center for the body's visceral homeostasis. Any of the alveolar glands in the mucosa of the cheek. These glands secrete several hormones, including the glucocorticoids which, among other things, influence the way the immune system works, and the mineralocorticoids, which affect retention of water and sodium. In warm-blooded animals, no effects are known. In men, LH also called interstitial cell-stimulation hormone (ICSH), stimulates testosterone secretion. Glands are divided into two main … Privacy & Trust Info Adrenal gland: A small gland located on top of the kidney. It is a mixed seromucous gland. The gonadotropic hormones are as follows: in women, follicle-stimulating hormone (FSH) stimulates development of ovarian follicles and their secretion of estrogen; in men, it stimulates spermatogenesis in the testes. It is called the master gland because it produces hormones that control other glands and many body functions including growth. Muscular weakness, reduced muscular tone, and general neuromuscular hypoexcitability occur. It secretes a thin, opalescent, slightly alkaline fluid that forms part of the semen. The glands are simple or branched alveolar glands, most of which open into hair follicles. Classification of glands according to mode of secretion. Slippery Words Quiz—Changing with the Times. All the steps in synthesizing and releasing thyroid hormones are stimulated by thyroid-stimulating hormone (TSH) secreted by the pituitary gland. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Exocrine glands secrete their products through a duct onto an outer or inner surface of the body, such as the skin or the gastrointestinal tract.Secretion is directly onto the apical surface. The pituitary gland averages 1.3 × 1.0 ×0.5 cm in size and weighs 0.55 to 0.6 g. Synonym: A modified sebaceous gland located on the neck of the penis and the inner surface of the prepuce; its secretion is a component of smegma. The endocrine glands include the adrenals, the parathyroids, the pineal, the pituitary, and the thyroid. Accessed 22 Jan. 2021. The glans penis, commonly referred to as the glans, is a structure at the distal end of the penis in male mammals. gland. It is a compound tubuloalveolar serous gland. 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. Anyone know if there is a connection between Fibromyalgia and your Thyroid gland? those in response to extreme stress, tend to increase the secretion of both norepinephrine and epinephrine; epinephrine is important in mobilizing the physiological changes that occur in the “fight or flight” response to emergency situations. 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. More intense emotional reactions, esp. A gland shaped like a single unbranched sac. Any of the simple, coiled, tubular glands found on all body surfaces except the margin of the lips, glans penis, and inner surface of the prepuce. Major clusters of endocrine tissue are also found in the gastrointestinal tract, the hypothalamus, the ovaries, the pancreas, the testes, and the placenta. They are holocrine glands whose secretion arises from the disintegration of cells filling the alveoli. Adrenal Glands Definition The adrenal glands are two separate glands located on the surface of the renal excretion apparatus. Any of the mucous glands in the tissue of the palate. The cortex arises in the embryo from a region of the mesoderm that also gives rise to the gonads. pineal gland synonyms, pineal gland pronunciation, pineal gland translation, English dictionary definition of pineal gland. Glands are divided into two main groups, endocrine and exocrine. See more. Glands are divided into two main groups, endocrine and exocrine. See more. Secretion may also be due to conditioned reflexes as when one thinks about food or hears a dinner bell. In large amounts, ADH also causes vasoconstriction, and is also called vasopressin. An organized aggregation of cells functioning as a secretory or excretory organ. — compare cowper's gland. : either of two oval racemose glands lying one to each side of the lower part of the vagina and secreting a lubricating mucus. These small glands are named by their locations, e.g., buccal salivary glands, lingual glands, although some glands are also known by the name of their original describers, and von Ebner glands, which are lingual salivary glands found in the circumvallate papillae of the tongue. Definition of pituitary gland : a small oval endocrine organ that is attached to the infundibulum of the brain, consists of an epithelial anterior lobe joined by an intermediate part to a posterior lobe of nervous origin, and produces various internal secretions directly or indirectly impinging on most basic body functions Pituitary gland: The main endocrine gland. Some aberrant glands are found in the cheeks or lips of the oral cavity, well separated from hair follicles. 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