The __________ is a fluid-filled sac that cushions the embryo and maintains a constant temperature.
A) placenta
B) umbilical cord
C) germ disc
D) amniotic sac
Correct Answer:
Verified
Q26: The _ will form muscles, bones, and
Q27: During the period of _, the developing
Q28: In the _, the blood vessels from
Q29: The age of viability refers to the
A)
Q30: Research in which mothers read aloud during
Q32: Cheri is 28 weeks pregnant, has gone
Q33: Newborns whose mothers had read The Cat
Q34: The age of viability occurs around
A) 17-21
Q35: The longest phase of prenatal development is
Q36: The umbilical cord
A) has blood vessels that
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