The umbilical cord rarely tangles during pregnancy because the
A) force of blood flowing through it keeps it firm.
B) walls of the cord are much too rigid for it to knot.
C) thickness of the amniotic fluid does not allow the cord to float freely in the uterus.
D) cord is simply too short to knot.
Correct Answer:
Verified
Q1: Fertilization usually takes place in the
A) uterus.
B)
Q2: The mesoderm will become the
A) nervous system
Q3: As early as the third month of
Q5: The trophoblast
A) develops into the nervous system
Q6: The ectoderm folds over to form the
A)
Q7: Lanugo
A) permits food and oxygen to reach
Q8: The _ surrounds the amnion.
A) placenta
B) yolk
Q9: The groundwork is laid for all body
Q10: Which of the following statements about a
Q11: The ovum
A) measures around 1/500 inch.
B) is
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