Delayed separation of this structure is often observed in individuals affected by leukocyte adhesion deficiency type 1. Two blood vessels traversing through this structure are connected by a shunt called Hyrtl’s (“HER-tulz”) anastomosis. Incorrect velamentous (“vill-luh-MEN-tuss”) insertion of either an accessory lobe or this structure usually leads to a condition known as vasa praevia (“vah-sah PREH-vee-ah”). This structure’s blood vessels are surrounded by a proteoglycan-rich substance called (*) Wharton’s jelly. Two arteries and one vein found in this structure are responsible for delivering and draining blood to and from the chorionic villi (“KOR-ree-ahn-nick VIHL-eye”), respectively. (-5[1])After one procedure, this structure’s blood can be stored in “banks” and harvested for its hematopoietic (-5[4])(“HEE-mah-toe-POE-eh-tick”) stem cells. For 10 points, name this structure that connects a fetus (-5[1])to the placenta (-5[1])during gestation. ■END■ (10[9])