The Various Systems and Organs Develop at Different Stages

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.

Correct Answer:

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