Research Results For 'Epithelium'

CHARADRIUS

Charadrius is a genus of birds which includes the lapwing, pratincole and oyster-catcher.

The genus is characterised by a long, slender, straight, or slightly recurvate bill, which is higher than broad at the base, and extremely compressed toward the end; an upper mandible with the dorsal line straight and slightly sloping at the base, somewhat convex beyond the nostrils, then straight and sloping to the point, the ridge broad and flattened as far as the prominence, afterwards extremely narrow, the sides sloping at the base, perpendicular towards the end, the edges rather sharp, the tip abrupt and wedge-shaped; the nasal groove is long and bare; a lower mandible with the angle of moderate length, the dorsal line ascending and slightly convex, the sides erect, the edges thin, the tip abrupt and wedged.

The nostrils are sub-basal, linear and near the margin. The head is of a moderate size, ovate with a rounded forehead; the neck is of moderate length; the body compact. The feet are of moderate length, rather stout; the tibia are bare for about a quarter of their length; the tarsus is slightly compressed and covered all round with hexagonal scales; the toes are of moderate length, stout, marginate, flat beneath, webbed at the base, the outer considerably longer than the inner, the first wanting. The claws rather small, arched, moderately compressed and obtuse. The plumage is generally blended and compact on the back. The wings are long and pointed, the first quill being the longest. The tail is short, nearly even, and comprised of twelve feathers. The tongue is short, triangular and fleshy; The Oesophagus is dilated into a fairly large crop; the stomach rectangular, muscular, with the epithelium dense and longitudinally rugous; the intestine is long and rather slender; the coeca is long and nearly cylindrical; the cloaca globular.
Research Charadrius

HOOF

A hoof is the horny casing of the foot of a ruminant, horse, swine or similar animals. Hooves may be regarded as homologues of the toe-nails of other animals. They are composed of epithelium cells, agglutinated and dried, and of intercellular substance and cell contents. Chemically they consist of keratin.
Research Hoof

EPITHELIAL ATTACHMENT

The epithelial attachment is the site of connection between the tooth structure and the gingeval epithelium. It is located at the base of the crown of the tooth, and just before the gum tissue terminates in the alveolus.
Research Epithelial Attachment

EPITHELIUM

Epithelium is an anatomical term for a basic type of bodily tissue. It comprises the external surface of the skin, the internal surfaces of the digestive, respiratory and urogenital systems, the closed serous cavities, the inner coats of the vessels, the acini and ducts of the secreting and excreting glands, the ventricles of the brain and the central canal of the spinal cord. The constituent cells of an epithelium are always closely packed together and the intercellular substance is reduced to a minimum. The cells comprising an epithelium are arranged in one (simple epithelium) or more (stratified epithelium and transitional epithelium) layers, usually supported on a basement membrane and united together by a cement-like substance which is chemically similar to the matrix or ground-substance of the connective tissues.

The epithelium serves various purposes. The epithelium of the skin (known as the epidermis) serves primarily to protect the underlying tissue (the true skin, nerves and vessels which it contains). Th epithelium of the salivary glands, the pancreas, the gastric glands and the glands of the small intestine are comprised of cells which prepare the digestive juices. The cells comprising the epithelium of the intestinal villi are concerned with the absorption of the products of digestion. The cells of the epitheliums of the serous cavities provide a smooth, moist surface. Rather unusually in the body, the epithelium is devoid of a blood supply
Research Epithelium

GINGEVAL EPITHELIUM

The gingeval epithelium is the outer layer of tissue which lines the sides and top of the gums. This epithelium provides a supportive and protective layer which is highly vascular. Inflammation of this layer is called gingivitis, and is one of the most common problems arising from poor dental hygiene.
Research Gingeval Epithelium

LAMINA PROPRIA

The lamina propria is the periosteal membrane which lines the alveolus. It lies below the gingeval epithelium at the surface and adjoins the neck and roots of the tooth. The lamina propria is also known as the mandibular or maxillary periosteum, depending upon in which bone the alveolus is located. It carries the nutrient vessels and nerves for the alveolus and the tooth itself.
Research Lamina Propria

MESOTHELIUM

In medicine, the mesothelium is the epithelium that forms the surface layer of the mesoderm and lines the embryonic body cavity. Tumours of the mesthelium are allegedly caused by breathing asbestos fibres, this forming the condition known as mesothelioma.
Research Mesothelium

PAPILLOMA

A papilloma is a benign tumour of the skin or of a mucous membrane, especially in the nasal cavity or the uterus. It consists of overgrown and thickened epidermis or epithelium and manifests itself as a wart, corn, polyp, or condyloma.
Research Papilloma

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