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The epithelial layer of cells lining the heart and vessels of the circulatory system.



a tissue found in animals and man consisting of specialized cells that line the inner surfaces of blood and lymph vessels, as well as the cavities of the heart. The endothelium is formed from the mesenchyme. It consists of a single layer of closely packed flat cells, which are usually separated from underlying tissues by a basal membrane. The endothelium of lymph vessels has no basal membrane. The cytoplasm of endothelial cells of certain capillaries may have pores that account for the permeability of the capillary wall, as, for example, in the renal glomeruli.

The endothelium of the enlarged capillaries of the blood-forming organs and the endothelium present in the liver, adrenal cortex, and certain other organs has a great capacity for phagocytosis. The endothelial cells of these organs belong to the reticuloendothelial system.

References in periodicals archive ?
a tesselation that will be called in this article "mosaic", word taken from the ophtalmology vocabulary to describe the pattern formed by the hexagonally-shaped cellular structure of the corneal endothelium.
The generic method for the recognition of the cell mosaic in human corneal endothelium microscopy images is presented through a synoptical scheme (Alg.
Neural networks have also been used to perform the task of segmenting corneal endothelium images, as for example in Salerno et al.
Granulometric moments and corneal endothelium status.
Although surgical techniques to replace the injured corneal endothelium have been developed, these procedures are technically difficult and challenging due to a shortage of donor corneas.
Prior to insertion, the host corneal endothelium is manually stripped.
The human corneal endothelium does not normally regenerate; the cell number is fixed at birth and only usually gradually reduces over time.
These morphological differences suggest that the corneal endothelium actively compensates for impaired [CI.
Patients who have had the latter require regular monitoring of their endothelial CD, as cell loss can be accelerated by IOL movement, IOL contact with the corneal endothelium from eye rubbing, or post-operative inflammation.
8mm (specified by phakic IOL manufacturers Ophtec BV and Staar Surgical Company), which is measured from the corneal endothelium to the anterior lens surface.
Such chemicals can cause damage to the corneal endothelium known as oxidative stress.
A study simulating the effects of phacoemulsification on an eye model found that OVDs in the anterior chamber reduced oxidative stress to the corneal endothelium.

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