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Urethral glands of Littré

Glands that branch off the wall of the urethra of male mammals. The glands secrete mucus and are most numerous in the section of the urethra that runs through the penis. Urethral glands produce a colloid secretion containing glycosaminoglycans; this secretion protects the epithelium against urine. (wikipedia.org) Syn: urethral glands, periurethral glands, Littre glands Word origin: Named after an anatomist, Alexis...

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Urine

/ˈyo͝orən/ Noun 1. A watery, typically yellowish fluid stored in the bladder and discharged through the urethra. It is one of the body’s chief means of eliminating excess water and salt and also contains nitrogen compounds such as urea and other waste substances removed from the blood by the kidneys. (Google dictionary) 2. A typically sterile liquid by-product of the body secreted by the kidneys through a process called urination and excreted through the urethra. (wikipedia.org) 3.(Physiology) Liquid excrement consisting of water, salts and urea, which is made in the kidneys, stored in the bladder, then released through the urethra. (wiktionary.org) 4. The waste products produced from metabolism. (biology-online.org)   Word origin: From Latin Urina, ae,...

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Uropygial gland

Noun 1. A bilobate sebaceous gland possessed by the majority of birds. It is located dorsally at the base of the tail (between the fourth caudal vertebrae and the pygostyle) and is greatly variable in both shape and size. In some species, the opening of the gland has a small tuft of feathers to provide a wick for the preen oil (see below). It is a holocrine gland enclosed in a connective tissue capsule made up of glandular acini that deposit their oil secretion into a common collector tube ending in a variable number of pores (openings), most usually two. Each lobe has a central cavity that collects the secretion from tubules arranged radially around the cavity. The gland secretion is conveyed to the surface via ducts that, in most species, open at the top of a papilla (nipple-like structure). (wikipedia.org) 2. A compound alveolar gland of birds located on the dorsum of the tail or pygostyle; the secretion of this gland (fatty acids and wax) exits from a papilla on the dorsal surface at the base of the tail feathers; the bird applies the substance to its feathers by means of the bill when preening. The uropygial gland is lacking in some species but its waterproofing ability is essential to water birds. (biology-online.org) 3. Oil-secreting gland situated at the base of the tail in most birds. (wordnetweb.princeton.edu) Syn:...

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Uvula

/ˈyo͞ovyələ/ Noun, pl. uvulae 1. A fleshy extension at the back of the soft palate that hangs above the throat. 2. A similar fleshy hanging structure in any organ of the body, particularly one at the opening of the...

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