Question

A misplaced velamentous insertion of this structure often results in vasa previa. A vein carrying oxygenated blood through this structure is shunted into the ductus venosus to avoid the liver. Instead of adventitia, this structure’s two arteries are surrounded by Wharton’s jelly. A flexible “nuchal” (“NOO-cull”) type of this structure can cause (20[1])asphyxiation. (20[1])Since HSCs and MSCs harvested from this structure are (*) safer than bone marrow stem cells for transplants, its blood is banked for long-term “biological insurance.” (10[1])This structure connects the amniotic sac (10[1])to (10[1])the placenta, (10[5])and a stump (10[1])left over (10[1])by clamping (10[2])it (10[1])creates (10[1])a scar (10[2])at the navel. (10[2])For 10 points, (10[1])what tube carrying (10[1])blood (10[1])from a mother to her fetus (10[1])is cut at birth? (10[1])■END■ (10[11])

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