a measure of spacing of the strands of a mesh or grid, expressed as the distance between strands for coarse meshes or a number of strands per unit length for fine meshes verb 7.
However, in minority of cases the red blood cells are destroyed due to mechanical damage, external toxins, parasites that enter the cell or immune proteins (complement) that attach to the blood cell and triggers its destruction. This is known as intravascular hemolysis.ore prominent symptoms are seen in cases where there is rapid and massive red blood cell destruction. Signs and symptoms include 1  : Shortness of breath. 2  Easily fatigued. 3  Chest pain. 4  Rapid heart rate. 5  Red to brown or dark yellow color of the urine. 6  Jaundice â yellow discoloration of the skin and eye. 7  Enlarged spleen and/or liver.
Vasodilation (or vasodilatation) refers to the widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. The process is the opposite of vasoconstriction, which is the narrowing of blood vessels. When blood vessels dilate, the flow of blood is increased due to a decrease in vascular resistance. Therefore, dilation of arterial blood vessels (mainly the arterioles) decreases blood pressure. The response may be intrinsic (due to local processes in the surrounding tissue) or extrinsic (due to hormones or the nervous system).