Effects of microbial contamination on the cecum enlargement of germfree rats.
D000109:Acetylcholine / Q000494:pharmacology; D000375:Aging; D000818:Animals; D002432:Cecum / Q000187:drug effects / Q000382:microbiology*; D003013:Clostridium; D005769:Gastrointestinal Motility; D005856:Germ-Free Life; D051381:Rats; D012701:Serotonin / Q000494:pharmacology
D012701:Serotonin; D000109:Acetylcholine