Mepụta nsụgharị dị mgbagwoju anya nke ahịrịokwu a Ọkpụkpụ sigmoid bụ akụkụ nke nnukwu eriri afọ nke dị nso na rectum na anus.
N'ezie, ụdị okwu dị mgbagwoju anya nke ahịrịokwu ahụ bụ "The sigmoid colon (pelvic colon; sigmoid flexure) na-eme ka mgbanaka nke dị ihe dị ka 40 cm. n'ogologo, ma na-adịkarị n'ime pelvis, ma n'ihi nnwere onwe nke ije ya, ọ nwere ike ịkwaga n'ime oghere afọ. "