the levels of cyclic amp were higher in the 3 types of muscle from 150-day fetuses ( 91 % of term ) than in adult muscles and even higher at 78-100 days fetal age , and histological evidence indicated that by 65 days gestation , the majority of the rhesus skeletal muscle cells are in the myotube stage .
C0026845
muscles
C1704336
skeletal muscle cells