Which of the following structures is most similar in function to a filtering system in the engine of a car that moves gas from the gas tank, filters impurities out of it, and delivers it to the carburetor?
A) the amniotic fluid
B) the amniotic sac
C) the placenta
D) the embryonic disk

Question

Quizplus · Accepted Answer

The placenta permits the exchange of nutritive and waste materials by diffusion across cell membranes, normally without any exchange of blood cells. Thus, the placenta serves as a filter. The placenta's role can be considered analogous to the role of a filtering system in the engine of a car.

Which of the Following Structures Is Most Similar in Function