Multiple Choice
Which of the following statements concerning the embryonic circulatory system is true?
A) The heart develops from four endothelial tubes.
B) Blood vessels form from blood islands.
C) An opening in the interatrial septum is called the sinus venosus.
D) The bulbus cordis becomes the sinoatrial node (the adult pacemaker) .
E) There is an opening in the interventricular septum.
Correct Answer:
Verified
Correct Answer:
Verified
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