During development of the heart
A
The pulmonary circulation is of lesser volume
B
Contraction starts at 3 weeks
C
The dorsal mesocardium breaks down to form the oblique pericardial sinus
D
The sinus venosus lies at the cranial end of the primitive tube
E
Muscles are of neural crest in origin
Correct Answer: The pulmonary circulation is of lesser volume, Contraction starts at 3 weeks