Inside the syncytium is a not very regular layer of circular muscle fibres, and within this again some rather scattered longitudinal fibres; there is no endothelium.
The vascular system itself is quite peculiar, consisting of lacunae and channels destitute of endothelium, situated within the thickness of the basementmembrane of the body-wall, of the gut-wall and of the mesenteries.
Certain free mobile cells within the body, such as blood-leucocytes, as well as others which are fixed, as for instance the endothelium of the hepatic capillaries, have the property of seizing upon some kinds of particulate matter brought within their reach.
Thus, while increased pressure in the blood or lymph vessels may be one factor, and increased permeability of the capillary endothelium another, increased osmotic pressure in the tissues and lymph is probably the most important in the production of dropsy.
Nevertheless the filament is a complete tube formed of chitinous substance and clothed externally by ciliated epithelium, internally by endothelium and lacunar tissue - a form of connective tissue - as shown in fig.
The ventricle and auricles of Anodonta lie in a pericardium which is clothed with a pavement endothelium (d, fig.
The structure of the corpora cavernosa consists of a strong fibrous coat, the tunica albuginea, from the deep surface of which numerous fibrous trabeculae penetrate the interior and divide it into a number of spaces which are lined with endothelium and communicate with the veins.
Probably the lining endothelium of the blood-vessels as well as other tissues of the body participate in the production of anti-substances.
Regarding the Echinoderms as a whole in the light of the foregoing account, we may give the following analytic summary of the characters that distinguish them from other coelomate animals: They live in salt or brackish water; a primitive bilateral symmetry is still manifest in the right and left divisions of the coelom; the middle coelomic cavities are primitively transformed into two hydrocoels communicating with the exterior indirectly through a duct or ducts of the anterior coelom; stereom, composed of crystalline carbonate of lime, is, with few exceptions, deposited by special amoebocytes in the meshes of a mesodermal stroma, chiefly in the integument; reproductive cells are derived from the endothelium, apparently of the anterior coelom; total segmentation of the ovum produces a coeloblastula and gastrula by invagination; mesenchyme is formed in the segmentation cavity by migration of cells, chiefly from the hypoblast.
Insulin has been demonstrated to have direct effects on the endothelium to increase NO bioavailability.
As well as the endothelium and underlying basement membrane, there is a small layer of loose connective tissue and some adipose tissue.
Can you identify the endothelium, and underlying connective tissue of the tunica intima layer in this photograph?
endothelium from different tissues express different patterns of adhesion molecules?
This suggests that acidic solutions may damage the bladder endothelium.
Rupture or ulceration of a plaque, by definition, implies loss of the overlying endothelium.
When inflammation develops in a tissue, lymphocytes and monocytes migrate out of the blood stream and cross the endothelium.
Provide adequate viscoelastic material (HPMC) in front and behind the nucleus to protect the endothelium as this is an open chamber.
The tunica intima has an endothelium of flattened endothelial cells.
Assuming the corneal thickness = 1 unit, assess the width of the " aqueous gap " from corneal endothelium to iris.
Kidney disease To study the regulation of complement activity on vascular endothelium; implications for kidney disease.
Firm adhesion of lymphocytes to hepatic endothelium Do specific chemokines regulate recruitment to the liver?
Vascular integrity in the healthy endothelium is maintained through the release of a variety of paracrine factors such as nitric oxide (NO ).
The ideal solution would be to study mass transfer across monolayers of cultured endothelium.
The barrier phenotype of the brain endothelium is induced and maintained by chemical factors released by brain cells, particularly perivascular astrocytic end feet.
Manipulation of growth factors and the endothelium holds promise for beneficial intervention in the range of diseases affecting the glomerulus.
vascular endothelium; implications for kidney disease.
In the latter case they invade cells of a leucocytic or phagocytic character as a rule; Leishman's form is particularly abundant in large macrophageal cells originating from the vascular endothelium of the spleen (fig.
Investigating the effects of rheumatoid arthritis Kidney disease To study the regulation of complement activity on vascular endothelium; implications for kidney disease.
Infective endocarditis is an infection of the endothelium, the tissue that lines the heart.
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