In these foci then, by the destruction of the epithelioid cells brought about by the tuberculin, substances must have been produced which act chemiotactically on the eosinophil cells.
The breaking up of ordinary pus cells or lymphocytes does not appear to give rise to any such substances; but there is much evidence that the decomposition products of epithelial and epithelioid cells act chemiotactically.
Giant cells, which also form by coalescence of the epithelioid cells, are not always present.
Previously to breaking down we have in a fully developed nodule healthy tissue, inflammatory zone, epithelioid cells, giant cells, containing nuclei and bacilli.
The production of their specific poisons changes the epithelioid cells in the centre of the nodule, some of which become fused together, whilst others expand and undergo division of nucleus.
At the periphery of this collection of epithelioid cells we have a congested area.
In three or four days this acts as an irritant upon the surrounding connective-tissue cells, which proliferate, and become changed into large cells known as epithelioid cells.
From the somatic mesoblast of the trunk is derived the single layer of longitudinal muscles of Sagitta, and part of the epithelioid lining of the body cavity.
In other cases they seem rather to be adjoining connective-tissue or epithelioid cells, though it is sometimes difficult to draw the line between such cells and germinal cells.
Eventually the central cells of the heart become blood corpuscles, while its walls are constituted of an outer muscular and inner epithelioid layer.
As a portion separated off from the archenteron, which gives rise both to the epithelioid lining of the body cavity, and of the water-vascular system.
The archenteron gives rise to the epithelioid lining of both body cavity and water-vascular system.
It gives origin to the epithelioid lining of the body cavity and water-vascular system of the adult[218].
These two layers form the epithelioid lining of the heart; between them is the cavity of the heart, which soon loses the protoplasmic trabeculae which at first traverse it.
It is formed of an outer muscular layer, within which is a doubly-contoured lining, containing nuclei at intervals, which is probably of the nature of an epithelioid lining (Pl.
These observations lead to the conclusion (1) that the heart arises as two independent splits between the splanchnic mesoblast and the hypoblast, each with an epithelioid (endothelial) lining.
Footnote 314: From observations on the development of the heart in the Fowl, I have been able to satisfy myself that the epithelioid lining of the heart is derived from the splanchnic mesoblast.
The cavity of the heart is circumscribed by a more or less complete epithelioid (endothelial) layer of flattened cells, connected with the splanchnic wall of the heart by protoplasmic processes.
The body cavity in the adult is well developed in the region of the intestine, where it forms a wide cavity lined by an epithelioid mesoblastic layer.
These two layers form together the epithelioid lining of the heart; between them is the cavity of the heart, which soon loses the protoplasmic trabeculae which at first traverse it.
The latter is theepithelioid lining of the heart, and the cavity it contains the true cavity of the heart.
By the formation of the cornea this space is shut off from the external skin, and on the appearance of the epithelioid layer of Descemet's membrane a continuous cavity is developed between the cornea and the lens.
This egg is contained in a capsule formed of a structureless wall lined by a flattened epithelioid layer.
The inner epithelioid tube takes its origin at the time when the general cavity of the heart is being formed by the separation of the splanchnic mesoblast from the hypoblast.
It is covered on either side by a layer of flat cells, which form part of the general peritoneal epithelioid lining, while its interior is composed of indifferent tissue.
This layer is the epithelioid layer of the membrane of Descemet.
The tubercle bacillus has rarely been found, but we have always observed characteristic epithelioid cells and giant cells in sections made from the edge or floor of the ulcer.
It affects the septum of the nose and adjacent parts, firm, translucent, greyish nodules containing lymphoid and epithelioidcells appearing in the mucous membrane.
On microscopical examination, however, there is evidence of infection in the shape of bacilli and of characteristic giant and epithelioid cells.
Ziegler maintains that the projections of the larger epithelioid cells and giant-cells become elongated, and eventually fused with capillaries, or the projections from capillaries.
The epithelioid cells of cutaneous cancers resemble those of the surface, the rete, or the glands of the skin.
The epithelioid cells eventually become fusiform or stellate, and their projections, as well as those of many of the giant-cells, become fibrillated.
The giant-cells, the epithelioid cells, and the well-characterized reticulum appear as the tubercle increases in age.
The degenerations of the epithelioid cells and stroma suggest qualifying terms.
Notwithstanding these resemblances, which are also present in secondary tumors at remote parts of the body, the epithelioid growth advances without limit and without reproducing the normal type.
The origin of mucus from epithelial cells under physiological and pathological conditions being apparent, it readily follows that the epithelioid cells of tumors might be supposed to be liable to a similar metamorphosis.
These are usually immediately surrounded by the large epithelioid cells, with one or more nuclei, which are often so numerous as to compose the greater part of the tubercle.
This observer[83] claimed that the epithelioid element of cutaneous cancers arose in all instances from pre-existing epithelium, either of the rete mucosum or cutaneous glands.
Cancerous growths of the skin and transitional membranes, often called epithelioma or cancroid, usually contain epithelioid cells resembling epidermis, and are therefore designated as epidermoid or pavement-celled cancer.
The horn-like, keratoid, transformation of epidermoid cells in cutaneous cancers, the mucous degeneration of the epithelioid cells of cancers of mucous membranes, are sufficiently familiar.
The active element of the cancer lies more especially in its epithelioid cells, and its growth takes place in an atypical rather than a typical manner.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "epithelioid" in a variety of sentences. We hope that you will now be able to make sentences using this word.
