Blood and cardiovascular disorders such as anemia, clotting defects, fragile capillaries, and heart congestion also cause abnormal bleeding.
As they train, hearts race at over 200 beats a minute; lactic acid builds to stinging levels in muscles; fragile capillaries burst in the lungs.
We propose that the explanation for how the bird can be so highly energetic yet also have such apparently fragile capillaries is the mechanical support provided by the dense packing of rigid air capillaries around the blood capillaries in the gas exchanging region of the lung.
Vasa vasorum derived fragile capillary-like vessels are prone to rupture and create intra plaque hemorrhages (IPH) which destabilize the plaque and promote the possibility of being prone to rupture with ensuing cardiovascular events.
Several pathways and processes have been strongly implicated, including the renin-angiotensin system, the polyol pathway, nonenzymatic glycation, endothelial dysfunction, vascular tone maintenance, extracellular matrix remodeling, and angiogenesis, which is dysregulated in diabetes leading to proliferation of new fragile capillaries that culminate in PDR.
In some places, the yellow plaster is so worn that you can see the outlines of the clay tiles beneath, like capillaries under fragile skin; in other places the plaster has flaked off altogether.
They are custom-made glass capillary ion-selective microelectrodes that are fragile, time-consuming to prepare, and can practically only be used to measure at one depth and one location in the brain.
The developed microelectrode is more robust than traditionally used glass capillary microelectrodes as it does not include any liquid in its construction nor is it as fragile.
In addition to the diffusion and capillary undercooling, the model incorporates the effects of a sharp decrease in the diffusion coefficient that is exhibited by fragile glass-forming systems, the presence of highly nonlinear liquidus lines at large undercooling, and the effects of non-equilibrium at the interface.
Looking at a bright scarlet shark – its skin removed to expose a dense web of capillaries – she said: "It looks so beautiful, almost like a work of art, but it also shows how fragile the creature is.
