I-colmo yeSigmoid: indawo, iimpawu ze-anatomical

I-Sigmoid colon (SC) ithathwa njengengxenye ephantsi yekholoni yekoloni, ewela kwi-rectum, ngoko, ithatha inxaxheba kwinkqubo yokuthutha iifesi kunye nokuphuma kwayo emzimbeni womntu.

Ngoko, i-colmo sigimoid inamalungiselelo kwindawo ephezulu yokuvula i-pelvis encinci, iqondiswa ngapha nangapha kwicala lasekunene lesaleni, iphinde iphendukele ngakwesobunxele kwaye, ifinyelele kumgca ophakathi, ihla, apho kwinqanaba lesithathu le-vertebra yesibindi iya kudlula ngqo emanzini. Ngexesha elifanayo, ubude balo bubungama-20 ukuya kwamashumi asixhenxe anesithandathu (centimeters) (ngokuqhelekileyo eli nani lilingana no-40 cm).

I-colmo sigimoid inezintambo ezimbini zokunyusa ezihla kwi-pelvic cavity. Ubungakanani kunye nokubunjwa kwala makhonkco ahlukileyo kwaye kuxhomekeke kwisakhiwo somzimba womntu, basondelene ne-bone leal left and descended into the pelvic cavity, enye ibhekane phantsi kwaye enye ijongene nayo. Yingakho ikoloni yesigmoid inefomu efana ne-S. Kwimiba engamashumi asixhenxe ukusuka kwekhulu ubude be-IC loop buhluka ukusuka kumashumi angamashumi amabini anesihlanu ukuya kuma-40 cm, kuthiwa yi-normosigma. Ukuba ubukhulu bayo buyingaphantsi kwamasentimitha angamashumi amabini anesihlanu, ikoloni yesigmoid ibizwa ngokuba yi-brachisigma. Ububanzi obungaphandle bentumbo bunamithamitha angama-6, ngoko ke xa kwenzeka ukudlula lo bunzima, kunokuthi iingqongqa zayo zinyaniswe.

I-SK ihlanganiswe ne-peritoneum kuwo onke macala, kwaye ine-mesentery, oko kukuthi, i-crease leyo inamathele kuyo udonga lwesisu, ubude beesentimitha ezilishumi elinesihlanu, enika ukuhamba okukhulu. Esi sihlomelo kwisakhiwo saso sinamacandelo amabini, enye iisentimitha ezilisibhozo ubude, enye ishumi. Yingakho i-SC inekhono lokutshintshela zombini kwisigxina se-pelvic, kunye nesisu okanye isibindi. Kufuneka kuqatshelwe ukuba i-mesentery iwela i-ureter, i-ovarian kunye neetyac iinqanawa ezisemgangathweni, kunye nezihlunu ze-lumbar kunye nesisu, inxalenye yomlomo wesibeleko. Emva koko kudlulela kumgangatho we-vertebrae yecandelo lobuso kwaye iphelela kwinqanaba le-vertebra yesithathu.

I-sigmoid colon, indawo evumela ukuba idibanise nentlungu encinci okanye iphathwe ngokunyanzeliswa okuncinci, inokudibanisa nazo zonke izitho zesigxina esiswini (ngaphandle kwepascreas) kunye nesigxina se-pelvis encinci.

Kufuneka kuqatshelwe ukuba ngokuqhelekileyo (phambi kobude obude) i-colon sigmoid colon ihamba kwi-ileum, ngoko ke kuyimfuneko ukuba ukwazi ukwahlula kwi-cecum. Ukwenza oku akuyi kuba nzima, kufuneka nje ukhumbule ukuba ukusuka e-UK ukuya kwinkqubo ye-glandular, engekho emathunjini oyimpumputhe.

Kwakhona, sigxininisa ukuba i-colmo sigimid, indawo echazwe ngasentla, ine-morphology eguquguqukayo kunye ne-anatomi, kuba ziyizo zenkqubo ezenzeka kuyo, kunye nomzimba womntu, iimpawu zakhe zeminyaka kunye nezinye izinto ezininzi.

Kwisiza sokutshintsha kwekhaloni kwisigmoid, ukugqithiswa kwe-lumen kuyabonwa, le ngqungquthela ibizwa ngokuba yi-sphincter ye-Bali. Kusemgangathweni wengxenyana ephezulu yesithambo esiswini kwaye unomlinganiselo ophezulu ukuya kwiisentimitha ezimbini. Ngaloo ndlela, ububanzi obungaphandle be-intestina obukuloo ndawo luvela kumitha ezimbini ukuya kwezine, kwaye kwindawo yesiphincter-ukuya kuma-centimitha amabini.

Kwakhona i-sigmoid colon ye-sphinker (ukuxinwa kwe-lumen) iphakathi, esi sakhiwo sibizwa ngokuba yi-sphincter ye-Myuthelia, kodwa iyakwazi ukuhambela kude nakwiziko layo. Kule meko, ububanzi obungaphandle bodonga emva kwalolu hlobo luvela kumitha ezimbini ukuya ezintandathu, kwaye kummandla we-Myuthelia - ukusuka kumgama omnye ukuya kumatentimitha amathathu.

Ngaloo ndlela, ngoku awaziwa kuphela apho ikholomu ye-sigmoid ikhona, kodwa kunye nezixhobo zayo ze-anatomiki. Idlala indima ebalulekileyo kumsebenzi womzimba womntu.