Umbilical cord(脐带) Folding -a purse string The placenta and the closure Umbilical cord Amnion membrane covered Umbilical cord Umbilical Cord: mucous ct, 3 vessels, yolk sac allantois Umbilical 50-60 cm, 2cm diameter cord Umbilical vein Placenta Fetal portion Maternal ong(80cm)-knots of placenta portion of placenta Short(<35cm)-abruptionUmbilical Cord(脐带) • Folding – a purse string closure – Amnion membrane covered – Cord: mucous CT, 3 vessels,yolk sac ,allantois – 50-60 cm, 2cm diameter – Long (>80cm)– knots – Short (<35cm)– abruption