meibomian gland definition
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- Medical Definition of MEIBOMIAN GLAND. : one of the long sebaceous glands of the eyelids that discharge a fatty secretion which lubricates the eyelids—called also tarsal gland; see chalazion.
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Medical Definition of Pituitary gland Pituitary gland: The main endocrine gland. It is a small structure in the head. It is called the master gland because it produces hormones that control other glands and many body functions including growth.The pituitary consists of the anterior and posterior pituitary.The anterior pituitary is the front portion of the pituitary.t is called the master gland because it produces hormones that control other glands and many body functions including growth. The pituitary consists of the anterior and posterior pituitary. The anterior pituitary is the front portion of the pituitary.
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- pl. ha·ben·u·lae (-lē') 1  A frenulum. 2  The stalk of the pineal gland. No longer in technical use. 3  A circumscript cell mass embedded in the posterior end of the medullary stria of the thalamus, from which it receives most of its afferent fibers. Also called habena, pedunculus of pineal body.
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Glandular Epithelium Glandular Epithelium. A gland is one or more cells that produce and secrete a specific product. The product is always a water-based fluid (aqueous) and usually contains proteins (the product is referred to as a secretion). Secretion is considered an active process. Glandular cells obtain substances needed from blood and transform them (chemically) into a product that’s discharged from the cell.
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SALIVARY GLAND • SUBMANDIBULAR GLAND (noun). The noun SUBMANDIBULAR GLAND has 1 sense: 1. a salivary gland inside the lower jaw on either side that produces most of the nocturnal saliva; discharges saliva into the mouth under the tongue.
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habenula habenula ha·ben·u·la (hā-běn'yə-lə) n. pl. ha·ben·u·lae (-lē') A frenulum. The stalk of the pineal gland. No longer in technical use. A circumscript cell mass embedded in the posterior end of the medullary stria of the thalamus, from which it receives most of its afferent fibers. Also called habena, pedunculus of pineal body.
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Sebaceous gland In the eyelids, meibomian glands, also called tarsal glands, are a type of sebaceous gland that secrete a special type of sebum into tears. Fordyce spots are ectopic (misplaced) sebaceous glands found usually on the lips, gums and inner cheeks, and genitals. Areolar glands surround the female nipples. Preputial glands also known as Tyson's glands are found in the genitals of both sexes of mice and rats.
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- target gland any gland affected by a secretion or other stimulus from another gland, such as those affected by the secretions of the pituitary gland. tarsal g's meibomian glands. thymus gland thymus. thyroid gland see thyroid gland.
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sudoriferous gland sudoriferous gland - any of the glands in the skin that secrete perspiration. sweat gland. cutis, skin, tegument - a natural protective body covering and site of the sense of touch; your skin is the largest organ of your body. duct gland, exocrine, exocrine gland - a gland that secretes externally through a duct.
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pineal gland pineal gland. noun. Medical Definition of pineal gland. : a small body that arises from the roof of the third ventricle and is enclosed by the pia mater and that functions primarily as an endocrine gland that produces melatonin—called also pineal, pineal body, pineal organ.
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- From Wikipedia, the free encyclopedia. For the fungi genus, see Chalazion (fungus) . A chalazion (/kəˈleɪziən/ ; plural chalazia /kəˈleɪziə/), also known as a meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland, usually on the upper eyelid. Chalazia differ from styes (hordeola) in that they are subacute and usually painless nodules.
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- Pineal gland definition, a small, cone-shaped endocrine organ in the posterior forebrain, secreting melatonin and involved in biorhythms and gonadal development. See more.
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Master Gland in Human Body .? 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. Also called hypophysis, master gland.
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gland Medical Definition of GLAND. 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.2.efinition of GLAND for Kids. : a cluster of cells or an organ in the body that produces a substance (as saliva, sweat, or bile) to be used by the body or given off from it.
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- As regards meibomian gland self-expression, there are several problems with this activity. First, not all meibomian gland problems are due to blockage of the orifices. If the glands are simply under-producing oils (a common problem in peri-menopausal women) pushing on them won't do anything.
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Meibomian Gland Dysfunction (MGD): The Cause Of Your Dry Eyes? Meibomian gland dysfunction is blockage or some other abnormality of the meibomian glands so they don't secrete enough oil into the tears. Because the tears then evaporate too quickly, MGD is a leading cause of dry eye syndrome. It also is associated with an eyelid problem called blepharitis.
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- Meibomian gland. n. Any of the various branched, modified, sebaceous glands situated in the tarsus of the eyelid, the secretions of which prevent the eyelids from sticking together.
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- Tear gland: The gland that makes tears. An abnormality of the tear glands can impair the production of the tears and lead to dry eyes.Also called a lacrimal gland.ear gland: The gland that makes tears. An abnormality of the tear glands can impair the production of the tears and lead to dry eyes.
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- A TBUT should show whether the oil layer of the tear film is adequate or not. Meibomian gland dysfunction is quite common and unfortunately it often goes undiagnosed. Even when diagnosed is often not treated or is not treated effectively until it has become chronic or severe. MGD may be inflammatory (often as a result of blepharitis) or atrophic.
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Pineal gland The pineal gland, also called the pineal body, is part of the epithalamus, and lies between the laterally positioned thalamic bodies and behind the habenular commissure. It is located in the quadrigeminal cistern near to the corpora quadrigemina.
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- Pineal Secrets: Pineal gland is the true master gland. It is situated between the eyes. It is the organ of clairvoyance, Third eye, the eye of Ra or Heru (God). Biblical Jacob saw God face to face on the island of Pe-ni-el. Its secretes melatonin which is anti ageing in effect and anti oxidant in nature. This also secretes melanin which colours our skin. The pineal gland, the most enigmatic of endocrine organs, has long been of interest to anatomists.
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- From Wikipedia, the free encyclopedia. For the fungi genus, see Chalazion (fungus) . A chalazion (/kəˈleɪziən/ ; plural chalazia /kəˈleɪziə/), also known as a meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland, usually on the upper eyelid.Chalazia differ from styes (hordeola) in that they are subacute and usually painless nodules.They may become acutely inflamed, but unlike a stye, chalazia are usually situated inside the lid rather than on the lid margin.halazia differ from styes (hordeola) in that they are subacute and usually painless nodules. They may become acutely inflamed, but unlike a stye, chalazia are usually situated inside the lid rather than on the lid margin.
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- The type of secretion of the sebaceous glands is referred to as holocrine. In the eyelids, meibomian glands, also called tarsal glands, are a type of sebaceous gland that secrete a special type of sebum into tears. Fordyce spots are ectopic (misplaced) sebaceous glands found usually on the lips, gums and inner cheeks.ebum, secreted by the sebaceous gland in humans, is primarily composed of triglycerides (~41%), wax esters (~26%), squalene (~12%), and free fatty acids (~16%). The composition of sebum varies across species. Wax esters, like squalene, are unique to sebum and not produced anywhere else in the body.
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Background The malignant sebaceous gland carcinoma most commonly arises in the periocular area. Fewer than 120 cases of sebaceous cell carcinoma have been reported at extraocular sites. The most common site of origin is the meibomian glands of the eyelids, leading to the term meibomian gland carcinoma. However, this neoplasm can occur in other sebaceous glands, such as in the caruncle, the glands of Zeis, and in the eyebrow.
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Eye health guide Chalazion or meibomian cyst (lump in eyelid) Chalazion overview A chalazion, also known as a meibomian cyst, is a lump in the eyelid that is caused by inflammation of a gland within the skin. Typically, this lump grows over days and weeks and is occasionally red, warm or painful. The gland involved in the formation of a chalazion is a modified sweat gland that lies within the eyelid and opens onto the inside of the eyelid. This gland produces oil. When this gland becomes blocked, it can rupture and the inflammation process begins.
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Sebaceous gland In the eyelids, meibomian glands, also called tarsal glands, are a type of sebaceous gland that secrete a special type of sebum into tears. Fordyce spots are ectopic (misplaced) sebaceous glands found usually on the lips, gums and inner cheeks, and genitals. Areolar glands surround the female nipples.