mumps (para 2-13b).
Umbilical vein--is obliterated and becomes the round ligament of the liver.
Ductus venosus--is obliterated and becomes a ligament.
Umbilical arteries--are obliterated and ultimately becomes ligaments.
Foramen ovale--closes after birth, after the umbilical cord is tied and cut.
Ductus arteriosus--is obliterated and becomes a ligament. (para 2-12).
placenta (para 2-11).
through the placenta (para 2-11).
End of Lesson 2