The ________ consists of a disk-shaped group of tissues in which small blood vessels from the mother and the offspring intertwine but do not join.
A)umbilical cord
B)amnion
C)placenta
D)endoderm

Question

Quizplus · Accepted Answer

The description provided matches that of the placenta, which is a disk-shaped organ formed in the uterus during pregnancy that allows exchange of nutrients, gases, and waste products between the mother and the developing fetus. The umbilical cord connects the fetus to the placenta, but does not have a disk-shaped appearance. The amnion is a fluid-filled sac that surrounds the developing fetus, and is not directly involved in nutrient and gas exchange. Endoderm is one of the three primary germ layers that give rise to all the tissues of the body during embryonic development, and is not related to the placenta.

The ________ Consists of a Disk-Shaped Group of Tissues in Which