Systems of life. No 144. Senior systems. 9.
D000368:Aged; D005767:Gastrointestinal Diseases / Q000175:diagnosis* / Q000209:etiology; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D006801:Humans; D007889:Leiomyoma / Q000175:diagnosis*; D011127:Polyps / Q000175:diagnosis*; D011379:Prognosis; D013274:Stomach Neoplasms / Q000175:diagnosis*