The _____ is/are responsible for oxygen and carbon dioxide transport to and from the maternal bloodstream.
A) decidua basalis
B) blastocyst
C) germ layer
D) chorionic villi

Question

Quizplus · Accepted Answer

Chorionic villi are finger-like projections that develop out of the trophoblast and extend into the blood-filled spaces of the endometrium.The villi obtain oxygen and nutrients from the maternal bloodstream and dispose of carbon dioxide and waste products into the maternal blood.The decidua basalis is the portion of the decidua (endometrium)under the blastocyst where the villi attach.The blastocyst is the embryonic development stage after the morula.Implantation occurs at this stage.The germ layer is a layer of the blastocyst.

The _____ Is/are Responsible for Oxygen and Carbon Dioxide Transport