Answer: cecum

AnswerCrossword Clue
CECUMIntestinal pouch
CECUMAnatomical cul-de-sac
CECUMThe appendix extends from it
cecumcul-de-sac, esp. that in which the large intestine begins
cecuma bodily cavity with one opening, also CAECUM
cecuma cavity open at one end (as the blind end of a duct)