A plateaued area of from 60% to 80% of the surface to form a bearing surface for the rings and to hold a film of oil.. A crosshatch with uniform cuts in both directions of approximately 45 degrees.
Description of Vascular Endothelial Growth Factor A Vascular Endothelial Growth Factor A: The original member of the family of endothelial cell growth factors referred to as VASCULAR ENDOTHELIAL GROWTH FACTORS. Vascular endothelial growth factor-A was originally isolated from tumor cells and referred to as tumor angiogenesis factor and vascular permeability factor. Although expressed at high levels in certain tumor-derived cells it is produced by a wide variety of cell types.
Causes of vascular disorders usually fit into one of 5 groups: 1  Traumatic, which occur after injury. 2  Compressive, which occur when the pipes flatten. 3  Occlusive, which occur when pipes are blocked. 4  Tumors (growths) or malformations (deformed, tangled pipes), which may or may not be present at birth.