The superficial layer of cells lining the alimentary canal and all its appendages, all glands and their ducts, blood vessels and lymphatics, serous cavities, etc. It often includes the epidermis (i. e., keratin-producing epithelial cells), and it is sometimes restricted to the alimentary canal, the glands and their appendages, -- the term endothelium being applied to the lining membrane of the blood vessels, lymphatics, and serous cavities.
the layer of cells that covers the body and lines many organs
Type of tissue that covers the outside of the body and makes up the lining and outer layers of most body organs and parts
(-ia) epi = upon + thele = nipple, ridge of the lip; cells that cover the ridges of the lip (Ruysch, c. 1700); cells covering organs and structures, or lining spaces, tubes (Henle, c. 1870); many epithelia separate the inside the body from the outside world and its inward extensions.
One of the four primary tissue types; a layer of cells that forms a superficial covering or an internal lining of a body cavity or vessel.
Coherent sheet comprising one or more layers of cells that covers an external body surface or lines an internal cavity. ( Figure 6-4)
Top layer of cells of mucosa
see limiting tissue.
a specialized type of tissue that normally lines the surfaces and cavities of the body.
Sheet of cells covering or lining an external surface or cavity.
Cellular covering of the internal and external surfaces of the body
The epithelium is a very fine protective outer layer of tissue on the front surface of the eye, covering the cornea. The epithelium regenerates itself every few days.
A major type of tissue in an organism, found lining body cavities and covering the outside of the body. The epidermis is an example of a specific type of epithelium.
The layer of cells covering internal and external surfaces of the body.
Thin membrane tissues covering most of the body's structures and organs, internal and external. Also describes the the first layers that heal over a wound.
a pileipellis made up of globose to broadly ellipsoid elements in more than one layer deep.
A major tissue type consisting of tissues that line or cover organs, have many cells and little matrix, and are avascular.
Epithelium is comprised of cells that cover the exterior surfaces of the body and line both the internal closed cavities of the body and those body tubes that communicate with the exterior (the alimentary, respiratory, and genitourinary tracts). It also forms the secretory portion (parenchyma) of glands and their ducts and the receptors of certain sensory organs.
The layer of cells that covers the outer surface of the cornea. During LASIK Surgery, the microkeratome makes a flap beneath the epithelium that is lifted so the laser can reshape the inner part of the cornea called the stroma.
Membranous tissue, usually in a single layer.
Coherent cell sheet formed from one or more layers of cells covering an external surface or lining a cavity.
In the lung, the epithelium is a thin layer of cells which lines the airway tubes in order to protect and regulate the tissue underneath
Outer layer of cells covering the cornea.
A sheet of cells above the basal lamina that is specialized for protection or transport.
membranous tissue covering internal organs and other internal surfaces of the body.
Layer of cells which lines a body cavity; cells may be ciliated or unciliated, and may be squamous (flat, scale-shaped), cuboidal (cube-shaped), or columnar (column-shaped). Your stomach and cheeks are lined with epithelium.
type of tissue that covers the body surface, lines its internal cavities and forms glands.
membranous tissue that forms a continuous layer covering internal or external surfaces of multicellular organisms.
The outermost layer of the cornea. It consists of five layers of cells which can be scraped off, causing an abrasion. This is removed in PRK but not in LASIK or LASEK.
a general term that is a layer(s) of cells that provide protection for the body
a sheet of cells that covers a body surface or lines a cavity
a sheet of closely packed cells arranged in one or more layers, that covers the outer surfaces of the body or lines any internal cavity or tube
A thin-layer of cells that line the surface of inner organs, including the respiratory tract, which serve as a barrier to the environment.
The most common cell of origin for human cancer.
Greek epi = upon, and thele = the nipple; the cell layer lining the internal and external surfaces of the body.
The outer most layer of the cornea. In PRK the epithielium is pushed aside so the excimer laser can treat the underlying corneal tissue. The epithelium then regenerates within 48hours as it was pre-procedure. In LASIK, the flap that is created contains the epithelium, and adhere's back onto the eye to cover the underlying tissue that has been treated.
Tissue that covers the external surface of a body and lines hollow structures.
Sensitive layer of tissue on the outer part of the cornea
a general term for a layer of cells covering the external surfaces of the body. See corneal epithelium.
Cells which make up the lining of the external surface and some internal linings of the body, i.e. the skins, the lining of the lungs, the genital tract, the bladder
A sheet of cells that covers the body surface or lines body cavities.
The outer layer of cells and protection from infection on the eye.
Top surface layer of the cornea; 6 - 7 cells thick
the superficial corneal layer
A superficial layer of tissue comprised of tightly joined cells.
the cells or membrane covering the outside of organs.
The tissue that lines the surfaces of the body's organs.
The outer layer of the cornea that acts as the eye's protective layer. Higher-Order Aberrations The ideal eye would have no aberrations, with light entering the eye focusing to a perfect point on the retina. Higher-order aberrations are very subtle aberrations. Our objective in your treatment is to minimise your resulting aberrations. With the NIDEK EC-5000 CXII Excimer Laser technology, we can reduce or minimise halos and glare and higher order aberrations. Higher-order aberrations do not always affect vision.
inner and outer tissue covering digestive tract organs.
Cellular tissue that covers a free surface or lines a hollow structure (ie, a tube) or cavity of the body.
Tissue that lines the hollow organs and all passages of the respiratory, digestive, and genitourinary systems.
A membranous cellular tissue that covers a free surface or lines a tube or cavity of an animal body and serves especially to enclose and protect the other parts of the body, to produce secretions and excretions and to function in assimilation. (Webster's New Collegiate Dictionary 1977)
a thin layer of cells that covers the internal and external surfaces of the body, including body cavities, ducts and vessels.
Membranous tissue composed of one or more layers of cells separated by very little intercellular substance and forming the covering of most internal and external surfaces of the body and its organs.
The cornea's outer layer of cells. Go to Top
the outside layer of cells.
One or more layers of EPITHELIAL CELLS, supported by the basal lamina, which covers the inner or outer surfaces of the body.
Membranous tissue constructed of one or more layers of cells that cover the internal and external surfaces of the body and its organs.
The protective layer of cells covering the cornea.
cellular lining that covers the surface (internal or external) of an organ
The covering of internal and external surfaces of the body including the lining and other small cavities.
The purely cellular, avascular layer covering all the free surfaces: cutaneous, mucous, and serous.
Layer of tissue that covers surfaces of organs.
The covering of the internal and the external organs of the body, as well as the lining of vessels, glands, and organs. It consists of cells bound together by connective material, and it varies in the number of layers and the kinds of cells it contains.
Gr. epi - on, upon; Gr. thele - nipple]. A tissue consisting of one or more layers of tightly associated cells forming a covering or lining; may be derived from endoderm, mesoderm, or ectoderm.
tissue forming outer cellular layer of body surface or the lining of a body cavity. Epithelial cells are frequently secretors.
The outermost cell layer of any tissue
a tissue forming the boundary of an organ; a characteristic tissue type forming such boundaries.
Cells covering the internal and external surfaces of the body
The thin layer of tissue that covers organs, glands, and other structures within the body.
The covering of the internal and external organs of the body. Also the lining of blood vessels, body cavities, glands, and organs.
the outermost layer of cells of the cornea and the eye's first defense against infection
Basic tissue type which covers and lines body cavities and surfaces
Cellular covering of internal and external body surfaces.