Incompetent deep veins lead to a reflux of blood pedally with the resultant dilation of distal veins, which itself causes valvular incompetence, setting up a vicious cycle.
Palaeoichnology would indeed be refined if the originator of each series of trails could be determined as to species, following which normal biosystematic nomenclature would be available.
pearling lugger
Tom was a thoroughly practical kind of a young fellow, and now he shook his head consideringly.
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