During the development of the fetus, its chorionic villi eventually meet with an area of uterine tissue to form the placenta. Which of the following statements accurately describes a function of the placenta? Select all answers that apply
A) It protects the umbilical cord.
B) It permits blood to bypass the right ventricle.
C) It cushions the fetus against injury.
D) It slows the maternal immune response.
E) It produces hormones that help maintain the pregnancy.
F) It carries waste away for excretion by the mother.
D, E, F
Feedback:
The placenta supplies the developing organism with food and oxygen, carries waste away for excretion by the mother, slows the maternal immune response so that the mother's body does not reject the fetal tissues, and produces hormones that help maintain the pregnancy. Wharton's jelly protects the umbilical cord and the foramen ovale permits most of the blood to bypass the right ventricle. The amniotic fluid cushions the fetus against injury.
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