2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85032A method for observing intra blood vessel ducts which are threadlike bundle of tubules which form a part of the BongHan duct system. By injecting 10% dextrose solution at a vena femoralis one makes the intravascular BongHan duct thicker and stronger to be easily detectable after incision of vessels. The duct is semi-transparent, soft and elastic, and composed of smaller tubules whose diameters are of 10$μ$m order, which is in agreement with BongHan theory.Medical PhysicsBiological PhysicsQuantitative Biologytext