in 9 fetuses , 9 to 24 weeks-old , the occurrence and relative distribution of argentaffin cells , as well as of cells immunoreactive to somatostatin ( srif ) , glucagon-like polypeptide ( gli ) , pancreatic polypeptide ( pp ) and substance p ( sp ) were studied in five segments of the colon ( appendix , cecum , ascending colon , descending colon , and rectosigmoid ) .
C0003617
appendix
C0007531
cecum