hair bulb definition
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bulb bulb. 1. a rounded organ of vegetative reproduction in plants such as the tulip and onion: a flattened stem bearing a central shoot surrounded by fleshy nutritive inner leaves and thin brown outer leaves. 2. a plant, such as a hyacinth or daffodil, that grows from a bulb. 3.
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Light fixture Ceiling light fixtures. A light fixture (US English), light fitting (UK English), or luminaire is an electrical device used to create artificial light by use of an electric lamp. All light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement. Fixtures may also have a switch to control the light. Fixtures require an electrical connection to a power source; permanent lighting may be directly wired, and moveable lamps have a plug.
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- CHEM 107 Hair handout. 3-22-05 and 3-24-05 Basic Structure of Hair A hair can be defined as a slender, thread-like outgrowth from a follicle in the skin of mammals. Composed mainly of keratin, it has three morphological regions—the cuticle, medulla, and cortex.
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Meaning of âfollicleâ in the English Dictionary follicle in British English. folliclenoun [ C ] A gland may be a simple pocket, or follicle, as is an oil gland of the skin, or it may be an aggregate of such glands, as is the liver. The hair grows from the bottom of the follicle by a multiplication of the cells covering the papilla upon which its root is moulded.
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ROOT root hair-thin hairlike outgrowth of an epidermal cell just behind the tip; absorbs nutrients from the soil. plant organ-a functional and structural unit of a plant or fungus.
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- Hair fetishism. Hair fetishism, also known as hair partialism and trichophilia, is a partialism in which a person sees hair – most commonly, head hair – as particularly erotic and sexually arousing. Arousal may occur from seeing or touching hair, whether head hair, pubic hair, axillary hair, chest hair or fur.
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- Related to hair follicle: hair bulb, sweat gland. n. A deep narrow pit that is formed by the tubular infolding of the epidermis and that encloses the root of the hair. n. (Biology) a narrow tubular cavity that contains the root of a hair, formed by an infolding of the epidermis and corium of the skin.
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- Critters cannot stand the smell of human hair, so sprinkling a barrier of hair clippings around your garden, or lightly working it into the soil when you plant bulbs, apparently does have some merit.
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- Hair whorl (horse). From Wikipedia, the free encyclopedia. A hair whorl is a patch of hair growing in the opposite direction of the rest of the hair. Hair whorls can occur on animals with hairy coats, and are often found on horses and cows.Locations where whorls are found in equines include the stomach area, the face, stifle areas, and sometimes on the hocks. hair whorl is a patch of hair growing in the opposite direction of the rest of the hair.
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What is the difference between a lamp and a bulb? Simply put, a lamp consists of a single bulb that includes a reflector and cage  also known as a lamp housing. On the other hand, a bulb is just one part of the lamp. Think of it in this way: a lamp is similar to an ink cartridge, whereas the bulb would be just the ink.
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Hair The word hair usually refers to two distinct structures: 1  the part beneath the skin, called the hair follicle, or, when pulled from the skin, the bulb. 2  the shaft, which is the hard filamentous part that extends above the skin surface.
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- When hair is formed by a rapid division of cells in the bulb, it absorbs melanin, which is produced by pigment cells. Melanin in the follicles is found interspersed in a remarkably rigid pattern in the follicle. Melanin is relatively absent in the matrix.
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- The bulb of penis refers to the bottom portion, or base, of the penis. The bulb is located above the scrotum, which contains the testicles.The bulb is composed of a large bundle of tissue. In conjunction with five other components, the bulb forms the internal structure of the penis and the visible, external shape of the penis.The bulb appears as a prominent ridge on the shaft of the penis.he bulb is composed of a large bundle of tissue. In conjunction with five other components, the bulb forms the internal structure of the penis and the visible, external shape of the penis. The bulb appears as a prominent ridge on the shaft of the penis.
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Picture of the Hair Hair is simple in structure, but has important functions in social functioning. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life. Hair growth occurs in cycles consisting of three phases: 1  Anagen (growth phase): Most hair is growing at any given time.
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Why The Heck Is My Hair Falling Out? The bulbs mean the hair has gone through a complete cycle of growth, suggesting that the cycle may have sped up due to stress. What you can do: In some cases, such as pregnancy or major surgery, you may have to bide your time until the hair loss slows.
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- Ceiling light fixtures. A light fixture (US English), light fitting (UK English), or luminaire is an electrical device used to create artificial light by use of an electric lamp. All light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement.
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filament bulb-electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity. electric light, electric-light bulb, incandescent lamp, light bulb, lightbulb. electric lamp-a lamp powered by electricity.
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Light fixture A light fixture (US English), light fitting (UK English), or luminaire is an electrical device used to create artificial light by use of an electric lamp. All light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement. Fixtures may also have a switch to control the light. Fixtures require an electrical connection to a power source; permanent lighting may be directly wired, and moveable lamps have a plug.
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- hair shirt definition, meaning, what is hair shirt: a shirt made of cloth containing hair that feels unpleasant on the skin and was worn in…. Learn more.
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- Bulb (photography) Detail of an old Kodak camera with shutter set to Bulb. Bulb, abbreviated B, is a shutter speed setting on an adjustable camera that allows long exposure times under the direct control of the photographer. With this setting, the shutter simply stays open as long as the shutter button remains depressed.
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- Definition of Hair follicle. Hair follicle: A sac from which a hair grows and into which the sebaceous (oil) glands open. The follicle is lined by cells derived from the epidermal (outside) layer of the skin. Each follicle normally goes through a five-year cycle of growth and rest, with about 90% of the follicles growing hair at any one time, averaging about six inches (15 cm) of growth per year. Derived from the Latin word follis, for bag. The human hair follicle is a dynamic structure that generates hair through a complex and exquisitely regulated cycle of growth and remodelling governed by numerous genes, Siobhn A. Jordan has noted in Molecular Medicine Today.
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- Hair cells are the sensory receptors in the inner ear that detect sound and head motion to begin the processes of hearing and balance control. The defining feature of hair cells is the hair bundle, the transduction organelle protruding from their apical surface composed of ordered arrays of stereocilia.
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Picture of the Hair Hair is simple in structure, but has important functions in social functioning. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft.
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- For hair cells on the external skin, see Hair follicle. For algal 'hair cells', see Trichocyte (disambiguation). Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates. Through mechanotransduction, hair cells detect movement in their environment.
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Picture of the Hair A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life. Hair growth occurs in cycles consisting of three phases:
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hairpin Definition of hairpin for English Language Learners. : 1  a pin that is worn in your hair; especially : a pin shaped like a U that is worn to hold your hair in place. : 2  an extremely sharp turn in a road that is shaped like a U.