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Velum
Velum may refer to: Human anatomy * Superior medullary velum, anterior medullary velum or valve of Vieussens, white matter, in the brain, which stretches between the superior cerebellar peduncles ** Frenulum of superior medullary velum, a slightly raised white band passing to the superior medullary velum * Inferior medullary velum or posterior medullary velum, a thin layer of white substance, prolonged from the white center of the cerebellum * Velum interpositum or choroid plexus, a structure in the brain where cerebrospinal fluid is produced ** Cavum veli interpositi, a condition in which the cistern of the velum interpositum becomes dilated * Palatal velum or soft palate, the soft tissue constituting the back of the roof of the mouth ** Levator velum palatini muscle or levator veli palatini, the elevator muscle of the soft palate Nature * Cumulonimbus velum, a cloud type * '' Solemya velum'', or Atlantic awning clam * Agrotis velum or lycophotia molothina, a moth * Velum ...
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Cumulonimbus Velum
Cumulonimbus velum (Cb vel) (from the Latin ''cumulonimbus'', "column-rain" + ''velum'', "veil") is a cumulonimbus cloud with an accessory cloud veil wrapped around its mid area, representing an area of humid stable air created as a result of the growth of the parent cumulonimbus. The altostratus velum cloud appears dark in comparison to its parent cloud, and can persist even after the cumulonimbus has disintegrated. The velum is very rare, as conditions necessary in development are infrequent. References

Cumulus {{Cloud-stub ...
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Superior Medullary Velum
The superior medullary velum (anterior medullary velum) is a thin, transparent lamina of white matter which - together with the inferior medullary velum - forms the roof of the fourth ventricle. It extends between the two superior cerebellar peduncles. The lingula of cerebellum covers - and adheres to - its dorsal surface. Anatomy Relations The superior medullary velum extends between the dorsomedial margins of the two superior cerebellar peduncles. On the dorsal surface of its lower half the folia and lingula are prolonged. It forms, together with the superior cerebellar peduncle, the roof of the upper part of the fourth ventricle; it is narrow above, where it passes beneath the facial colliculi, and broader below, where it is continuous with the white substance of the superior vermis. A slightly elevated ridge, the frenulum veli, descends upon its upper part from between the inferior colliculi, and on either side of this the trochlear nerve emerges. Blood supply Bl ...
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Frenulum Of Superior Medullary Velum
The frenulum veli, or frenulum of superior medullary velum, also known as the ''frenulum veli medullaris superioris'', ''cerebellar frenulum'', or ''frenulum cerebelli'', is a slightly raised white band passing from the inferior end of the medial longitudinal fissure, through the groove between the quadrigeminal bodies, and down to the superior medullary velum. On either side of this band the trochlear nerve emerges, and passes forward on the lateral aspect of the cerebral peduncle The cerebral peduncles (In Latin, ''ped-'' means 'foot'.) are the two stalks that attach the cerebrum to the brainstem. They are structures at the front of the midbrain which arise from the ventral pons and contain the large ascending (sensor ... to reach the base of the brain. References * Crosby EC, Humphrey T, Lauer EW, ''Correlative Anatomy of the Nervous System'', New York: MacMillan, 1962. * Stedman, Thomas Lathrop, ''Stedman's Medical Dictionary'' (24th edition), Williams and Wilkins Co ...
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Inferior Medullary Velum
The inferior medullary velum (posterior medullary velum) is a thin layer of white substance, prolonged from the white center of the cerebellum, above and on either side of the nodule; it forms the infero-posterior part of the fourth ventricle The fourth ventricle is one of the four connected fluid-filled cavities within the human brain. These cavities, known collectively as the ventricular system, consist of the left and right lateral ventricles, the third ventricle, and the fourth .... Somewhat semilunar in shape, its convex edge is continuous with the white substance of the cerebellum, while its thin concave margin is apparently free; in reality, however, it is continuous with the epithelium of the ventricle, which is prolonged downward from the posterior medullary velum to the taeniae. See also * Superior medullary velum References Neuroanatomy {{Portal bar, Anatomy ...
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Velum Interpositum
The choroid plexus, or plica choroidea, is a plexus of cell (biology), cells that arises from the tela choroidea in each of the ventricular system, ventricles of the brain. Regions of the choroid plexus produce and secrete most of the cerebrospinal fluid (CSF) of the central nervous system. The choroid plexus consists of modified ependymal cells surrounding a core of capillary, capillaries and Stroma (tissue)#Types, loose connective tissue. Multiple cilia on the ependymal cells move to circulate the cerebrospinal fluid. Structure Location There is a choroid plexus in each of the four ventricular system, ventricles. In the lateral ventricles, it is found in the Body of the lateral ventricle, body, and continued in an enlarged amount in the Trigone of the lateral ventricle, atrium. There is no choroid plexus in the Anterior horn of lateral ventricle, anterior horn. In the third ventricle, there is a small amount in the roof that is continuous with that in the body, via the In ...
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Cavum Veli Interpositi
In the brain, the cavum veli interpositi (CVI) is a condition in which the cistern of the velum interpositum becomes dilated. The phenomenon usually occurs in newborns. Axial MR/CT show a triangular-shaped cerebrospinal fluid (CSF) space between the lateral ventricles. On sagittal images, CVI can appear as a slit-like, linear-to-round/ovoid CSF collection below the fornices, and above the 3rd ventricle. There are usually no associated abnormalities, although larger lesions may cause an obstructive hydrocephalus. No treatment is usually necessary.Emedicine -- Cavum vergae See also * Cavum Vergae * Cavum septi pellucidi The cave of septum pellucidum (CSP), cavum septi pellucidi, or cavity of septum pellucidum is a slit-like space in the septum pellucidum that is present in fetuses but usually fuses during infancy. The septum pellucidum is a thin, laminated tran ... References {{reflist Brain Ventricular system ...
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Soft Palate
The soft palate (also known as the velum, palatal velum, or muscular palate) is, in mammals, the soft biological tissue, tissue constituting the back of the roof of the mouth. The soft palate is part of the palate of the mouth; the other part is the hard palate. The soft palate is distinguished from the hard palate at the front of the mouth in that it does not contain bone. Structure Muscles The five muscles of the soft palate play important roles in swallowing and breathing. The muscles are: # Tensor veli palatini, which is involved in swallowing # Palatoglossus, involved in swallowing # Palatopharyngeus, involved in breathing # Levator veli palatini, involved in swallowing # Musculus uvulae, which moves the palatine uvula, uvula These muscles are innervated by the pharyngeal plexus of vagus nerve, pharyngeal plexus via the vagus nerve, with the exception of the tensor veli palatini. The tensor veli palatini is innervated by the mandibular division of the trigeminal nerve (V ...
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Levator Velum Palatini Muscle
Levator muscle can refer to: * Levator scapulae muscle * Levator palpebrae superioris muscle * Levator ani * Levator labii superioris alaeque nasi muscle * Levator veli palatini * Levator muscle of thyroid gland * Levator labii superioris * Levator anguli oris The levator anguli oris (caninus) is a facial muscle of the mouth arising from the canine fossa, immediately below the infraorbital foramen. It elevates angle of mouth medially. Its fibers are inserted into the angle of the mouth, intermingli ...
{{disambig ...
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Solemya Velum
''Solemya'' is a genus of saltwater clams, marine (ocean), marine bivalve mollusks in the family Solemyidae, the awning clams. ''Solemya'' is the type genus of the family Solemyidae. Description The shell Valve (mollusc), valves of species in this genus are fragile and subcylindrical in shape; there are no hinge teeth. The shell has a persistent thin periostracum which extends beyond the valve margins, hence the common name "awning clams". These clams have chemosynthesis, chemosynthetic bacterial symbionts that produce their food. The bacteria live within their gill cells, and produce energy by oxidizing hydrogen sulfide, which they then use to fix carbon dioxide via the Calvin cycle. This symbiosis has been best-studied in the Atlantic species ''Solemya velum, S. velum'' and the Pacific species ''Solemya reidi, S. reidi''. Species Species within the genus ''Solemya'' include: * ''Solemya africana'' * ''Solemya atacama'' * ''Solemya australis'' * ''Solemya borealis'' * ''Solemya ...
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Agrotis Velum
''Lycophotia molothina'' is a species of moth in the family Noctuidae. It is distributed throughout south-western and central Europe and is found wherever its food plants grow. It is traditionally thought of as a species of heathland. This species shows a wingspan of 38–40 mm. The forewings are brown or grey, often tinged with red or blue and marked with a whitish streak at the front part. Orbicular and reniform stigma are grey and well defined. The hindwings are light grey. Lycophotia molothina flies from May to the end of July and is attracted to light and sugar. The young larva is light green with five pale lines. Adult larvae change their colour into dark green, reddish or brown. They feed on ''Calluna vulgaris ''Calluna vulgaris'', common heather, ling, or simply heather, is the sole species in the genus ''Calluna'' in the flowering plant family Ericaceae. It is a low-growing evergreen shrub growing to tall, or rarely to and taller, and is found wide ...''. The s ...
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Veil (mycology)
A veil or velum, in mycology, is one of several structures in fungi, especially the thin membrane that covers the cap and stalk of an immature mushroom.
Encarta Dictionary Veils fall into two categories: *
Partial veil In mycology, a partial veil (also called an inner veil, to differentiate it from the "outer", or universal veil) is a temporary structure of tissue found on the fruiting bodies of some Basidiomycota, basidiomycete fungus, fungi, typically agarics. ...
* Universal veil


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Quillworts
''Isoetes'', commonly known as the quillworts, is a genus of Lycopodiopsida, lycopod. It is the only living genus in the family Isoetaceae and order Isoetales. , there were about 200 recognized species, with a cosmopolitan distribution mostly in aquatic habitats but with the individual species often scarce to rare. Species virtually identical to modern quillworts have existed since the Jurassic epoch, though the timing of the origin of modern ''Isoetes'' is subject to considerable uncertainty. The name of the genus may also be spelled ''Isoëtes''. The Diaeresis (diacritic), diaeresis (two dots over the e) indicates that the o and the e are to be pronounced in two distinct syllables. Including this in print is optional; either spelling (''Isoetes'' or ''Isoëtes'') is correct. Description Quillworts are mostly aquatic or semi-aquatic in clear ponds and slow-moving streams, though several (e.g. ''Isoetes butleri, I. butleri'', ''Isoetes histrix, I. histrix'' and ''Isoete ...
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