The various systems and organs develop at different stages. Which statement is accurate?
a. The cardiovascular system is the first organ system to function in the developing
human.
b. Hematopoiesis originating in the yolk sac begins in the liver at 10 weeks.
c. The body changes from straight to C-shaped at 8 weeks.
d. The gastrointestinal system is mature at 32 weeks.
A
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A The heart is developmentally complete by the end of the embryonic stage.
B Hematopoiesis begins in the liver during the 6th week.
C The body becomes C-shaped at 21 weeks.
D The gastrointestinal system is complete at 36 weeks.
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