Various stem cells in acupuncture meridians and points and their putative roles

Schematic representation of a primo vessel. A = primo vessel, B = primo node, duct = ductule, Ep = epithelial cell, En = endothelial cell, Eos = eosinophil, Chr = chromaffin cell, His = histiocyte, Lym = lymphocyte, PM = primo microcells and other types of stem cells.288