Question

quiz instructions this exam is closed - book. before starting, make sure you have studied all of the questions on your previous a&p quizzes. question 47 2 pts which membrane of the placenta forms a sac immediately around the fetus? allantois amnion urachus chorion

Explanation:

The amnion is the innermost fetal - membrane that forms a fluid - filled sac immediately around the fetus, providing protection. The allantois is involved in waste management and gas exchange in the embryo. The urachus is a remnant of the allantois in the fetus. The chorion is the outermost fetal membrane and contributes to the formation of the placenta.

Answer:

B. amnion