The rectum and anus.
D000038:Abscess; D001003:Anal Canal; D005401:Fissure in Ano; D006801:Humans; D012004:Rectal Neoplasms; D012005:Rectal Prolapse; D012007:Rectum
ABSCESS; FISSURE IN ANO; RECTAL NEOPLASMS; RECTAL PROLAPSE