THORAX ABDOMEN AND PELVIS

MEDICAL

OVARIES AND FALLOPIAN TUBES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is NOT true about the placenta?
A
Nutrients, gases, and wastes diffuse in 2 directions within it.
B
It is formed after the egg has been fertilized by a sperm cell.
C
Found only in mammals, eg. humans
D
Maternal and fetal blood mix in this structure.
Explanation: 

Detailed explanation-1: -Oxygen and nutrients from the mother’s blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby’s liver. There it moves through a shunt called the ductus venosus.

Detailed explanation-2: -If the baby’s blood is Rh+ and gets into the mother’s Rh-bloodstream, her body will produce antibodies. These antibodies could pass back through the placenta and harm the developing baby’s red blood cells. This can cause mild to serious anemia in the unborn baby.

Detailed explanation-3: -The fetal part of the placenta is known as the chorion. The maternal component of the placenta is known as the decidua basalis. Oxygen and nutrients in the maternal blood in the intervillous spaces diffuse through the walls of the villi and enter the fetal capillaries.

There is 1 question to complete.