A persons umbilical line of thinking (HUV) and artery (HUA) and placental vessels (HPV-A1/A2, first-, second-order branch of veins in parias, mainly the key stem villous arteries; HPV-A3, branch of the key stem villous arteries, micro-vessels with size around one hundred and fifty um) had been carefully separated
A persons umbilical line of thinking (HUV) and artery (HUA) and placental vessels (HPV-A1/A2, first-, second-order branch of veins in…