The embryo receives nutrients from the amniotic sac.
(1 point)
Responses
true
true
false
false
How many trimesters is the length of pregnancy divided into?
(1 point)
Responses
one
one
two
two
three
three
four
three
The first system to develop in the unborn baby is the _____.
(1 point)
Responses
nervous system
nervous system
respiratory system
respiratory system
urinary system
urinary system
muscular system