Fraternal multiples have……placenta/s and ……..amniotic sac/s.
a) same-same
b) same-separate
c) separate-same
d) separate-separate
Some cells of the embryo grow into a disk like structure called………
a) amniotic sac
b) placenta
c) umbilical cord
d) all of these
The placenta closely attaches to embryo by a tube called………
a) neural tube
b) umbilical cord
c) spinal cord
d) all of these
The …….connects the embryo to the placenta.
a) spinal cord
b) amniotic sac
c) neural tube
d) umbilical cord
The blood vessels of the placenta are close to those of uterus; which of the following can pass from the mother’s blood the embryo’s blood?
a) glucose
b) amino acids
c) salts
d) all of these
Which of the following in the embryo’s blood escape in the placenta and are carried away by mother’s blood in uterus?
a) carbon dioxide
b) urea
c) glucose and salts
d) both a and b
