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Sulcus Arteriæ Vertebralis
''Sulcus'' (plural ''sulci'') may refer to: * Gingival sulcus, the space between a tooth and surrounding tissue * Sulcus (morphology), a groove, crevice or furrow in medicine, botany, and zoology * Sulcus (neuroanatomy), a crevice on the surface of the brain * Sulcus (geology), a long parallel groove on a planet or a moon * Coronal sulcus, the groove under the corona of the Glans penis * In botany, sulci in seeds or pollen grains are colpi See also * Sulci, an ancient town in southwest Sardinia notable for the Battle of Sulci in 258 BC * Sulcalization, a term in phonetics and phonology * Gyrification {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gingival Sulcus
The gingival sulcus is an area of potential space between a tooth and the surrounding gingival tissue and is lined by sulcular epithelium. The depth of the sulcus (Latin for ''groove'') is bounded by two entities: apically by the gingival fibers of the connective tissue attachment and coronally by the free gingival margin. A healthy sulcular depth is three millimeters or less, which is readily self-cleansable with a properly used toothbrush or the supplemental use of other oral hygiene aids. Anatomy The Dentogingival tissues consist of many constituents, such as the enamel or cementum of the tooth and the connective tissue supporting epithelia like the junctional epithelium, the gingival epithelium and the sulcular epithelium. The junctional epithelium is developed during the eruption of teeth when the reduced enamel epithelium merges with the oral epithelium The reduced enamel epithelium forms the first junctional epithelium and is firmly attached to the enamel. In c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulcus (morphology)
In biological morphology and anatomy, a sulcus (pl. ''sulci'') is a furrow or fissure (Latin ''fissura'', plural ''fissurae''). It may be a groove, natural division, deep furrow, elongated cleft, or tear in the surface of a limb or an organ, most notably on the surface of the brain, but also in the lungs, certain muscles (including the heart), as well as in bones, and elsewhere. Many sulci are the product of a surface fold or junction, such as in the gums, where they fold around the neck of the tooth. In invertebrate zoology, a sulcus is a fold, groove, or boundary, especially at the edges of sclerites or between segments. In pollen a grain that is grooved by a sulcus is termed sulcate. Examples in anatomy Liver *Ligamentum teres hepatis fissure *Ligamentum venosum fissure *Portal fissure, found in the under-surface of the liver *Transverse fissure of liver, found in the lower surface of the liver *Umbilical fissure, found in front of the liver Lung *Azygos fissure, of ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulcus (neuroanatomy)
In neuroanatomy, a sulcus (Latin: "furrow", pl. ''sulci'') is a depression or groove in the cerebral cortex. It surrounds a gyrus (pl. gyri), creating the characteristic folded appearance of the brain in humans and other mammals. The larger sulci are usually called fissures. Structure Sulci, the grooves, and gyri, the folds or ridges, make up the folded surface of the cerebral cortex. Larger or deeper sulci are termed fissures, and in many cases the two terms are interchangeable. The folded cortex creates a larger surface area for the brain in humans and other mammals. When looking at the human brain, two-thirds of the surface are hidden in the grooves. The sulci and fissures are both grooves in the cortex, but they are differentiated by size. A sulcus is a shallower groove that surrounds a gyrus. A fissure is a large furrow that divides the brain into lobes and also into the two hemispheres as the longitudinal fissure. Importance of expanded surface area As the surfac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulcus (geology)
Sulcus (plural: sulci ) is, in astrogeology, an area of complex parallel or subparallel ridges and furrows on a planet or moon. For example, Uruk Sulcus is a bright region of grooved terrain adjacent to Galileo Regio on Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but ...'s moon Ganymede. References Planetary geology {{geology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glans Penis
In male human anatomy, the glans penis, commonly referred to as the glans, is the bulbous structure at the distal end of the human penis that is the human male's most sensitive erogenous zone and their primary anatomical source of sexual pleasure. It is anatomically homologous to the clitoral glans. The glans penis is part of the male reproductive organs in humans and other mammals where it may appear smooth, spiny, elongated or divided. It is externally lined with mucosal tissue, which creates a smooth texture and glossy appearance. In humans, the glans is a continuation of the corpus spongiosum of the penis. At the summit appears the urinary meatus and at the base forms the corona glandis. An elastic band of tissue, known as the frenulum, runs on its ventral surface. In men who are not circumcised, it is completely or partially covered by the foreskin. In adults, the foreskin can generally be retracted over and past the glans manually or sometimes automatically during an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colpus
Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of gymnosperms. If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the female gametophyte. Individual pollen grains are small enough to require magnification to see detail. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics. Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. In a case of self-pollination, this process takes place from the anth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulci
Sulci or Sulki (in Greek , Steph. B., Ptol.; , Strabo; , Paus.), was one of the most considerable cities of ancient Sardinia, situated in the southwest corner of the island, on a small island, now called Isola di Sant'Antioco, which is, however, joined to the mainland by a narrow isthmus or neck of sand. South of this isthmus, between the island and the mainland, is an extensive bay, now called the Golfo di Palmas, which was known in ancient times as the ''Sulcitanus Portus'' (Ptol.). Origins The foundation of Sulci (Punic:) is expressly attributed to the Carthaginians (Paus. x. 17. § 9; Claudian, ''B. Gild.'' 518), and it seems to have become under that people one of the most considerable cities of Sardinia, and one of the chief seats of their power in the island. However, as noted by archaeologists the city was founded by Tyrians during the late 9th century bc, and most of the inhabitants were probably native Sardinians, it remained independent until Carthage conquered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulcalization
Sulcalization (from la, sulcus 'groove'), in phonetics, is the pronunciation of a sound, typically a sibilant consonant, such as English and , with a deep ''groove'' running along the back of the tongue that focuses the airstream on the teeth, producing a more intense sound. This is accomplished by raising the sides of the back of the tongue ("lateral contraction") and leaving a hollow along the mid-line. It is not clear if all sibilants are grooved to at least some extent. Catford (1977) observed that the degree of tongue grooving differs between places of articulation as well as between languages; however, no language is known to contrast sibilants based purely on the presence or absence of tongue grooving. English , which allows various tongue positions without apparent distinction, may also receive its characteristic quality from having a grooved tongue shape. has also been reported to show tongue grooving in English, despite being a non-sibilant fricative (Stone & Lundberg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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