Sigmoid ciwon: da wuri, da sifofin

Sigmoid ciwon (SK) an dauke su da ƙananan ɓangare na ciwon, wanda ya wuce a cikin ciwon, a saboda haka, shi ke taka rawa a cikin aiwatar da jigilar faeces da m kawar daga jikin mutum.

Saboda haka, da wuri daga cikin sigmoid ciwon ne a cikin kusanci da babba bude wani kananan kwari, shi ne directed laterally zuwa gefen dama zuwa krestsu, sa'an nan ya jũya zuwa hagu da kuma kai da tsakãtsaki ce line ke sauka, inda a na uku vertebra krestsovogo wuce a cikin dubura. A wannan yanayin, ta tsawon jeri daga ashirin zuwa saba'in da biyar santimita (sau da yawa wannan adadi ne daidai da arba'in da biyar santimita).

Sigmoid ciwon yana da biyu flexure hinges gangara zuwa cikin kafafuwa. A size da kuma siffar wadannan madaukai ne daban-daban da kuma dogara a kan tsarin da jikin mutum, su ne m zuwa hagu ilium, da kuma ta sauka a cikin pelvic rami, tare da daya daga cikinsu suna fuskantar ƙasa, da kuma sauran - up. Wannan shi ne dalilin da ya sa sigmoid ciwon muhimmi S- dimbin yawa. Saba'in lokuta daga wani mutum ɗari da tsawon da IC madauki dabam daga ashirin da biyar zuwa arba'in da biyar santimita, shi ne ake kira normosigma. Idan ta size ne kasa da ashirin da biyar santimita, da ake kira sigmoid ciwon brahisigmoy. A m diamita na shida ciwon santmetrov, duk da haka idan na wucewa wannan size, shi za a iya bayar da hujjar cewa ganuwar ta thickened.

SC peritoneum rufe a kan kõwane kuma yana da wata mesentery, Ina nufin a Musulunci, ta hanyar da hanji da aka kulla da na ciki bango na goma sha biyar santimita dogon, wanda ya samar da shi tare da mafi girma motsi. Wannan Musulunci a cikin tsarin yana da rabo biyu, a tsawon takwas a santimita, da sauran - at goma. Wannan shi ne dalilin da ya sa IC yana da ikon matsawa a cikin pelvic kogo, da kuma a cikin shugabanci da ciki ko da hanta. Note cewa intersects mesentery ureter, ovarian da iliac tasoshin dake a cikin gefe saman kazalika da lumbar da iliac tsokoki, da hagu sacral hadin gwiwa. Sa'an nan ta motsa zuwa ga surface na vertebral krestsovogo sashen da ƙare a na uku vertebra.

Sigmoid ciwon, da wuri na da damar da shi su zo a cikin lamba tare da kananan hanji ko a spliced tare da su adhesions, iya zo a cikin lamba tare da duk hukumomi kamar na ciki (sai pancreas) kazalika da pelvic kogo.

Ya kamata a lura cewa sau da yawa quite (idan dogon mesentery) sigmoid ciwon an koma cikin iliac fossa, don haka dole ne ka iya rarrabe shi daga cecum. Make shi ne, ba wuya, kawai bukatar mu tuna cewa motsi daga SC shaƙewa matakai cewa ba a cikin hanji makafi.

Har yanzu, mu jaddada cewa sigmoid ciwon, da wurin da abin da aka bayyana a sama, yana da m ilimin halittar jiki da kuma ilmin jikin mutum, kamar yadda suka zaviyast na matakai da faruwa a shi, kazalika da jikin mutum, ta shekaru fasali da kuma wasu dalilai.

A miƙa mulki ga sauko ciwon sigmoid lura takaita na lumen, wannan sabon abu ne da ake kira sphincter na Bali. An located a saman da iliac kashi da yana da tsawon har zuwa biyu santimita. Saboda haka, m diamita na miki, ayi a baya cewa zone ne daga biyu zuwa hudu santimita, kuma a sfinkernoy yanki - har zuwa biyu santimita.

Har ila yau, da wuri daga cikin sigmoid ciwon sfinkera (lumen takaita) yana a cikin tsakiyar, wannan tsarin da ake kira sphincter Myute, amma shi za a iya koma da kara daga cibiyar. A wannan yanayin waje diamita hanji domin wannan sashi an hada biyu zuwa shida santimita, kuma a Myute zone - daga daya zuwa uku da santimita.

Saboda haka, yanzu mun san ba kawai inda sigmoid ciwon, amma kuma ta sifofin. Yana taka muhimmiyar rawa a cikin jikin mutum.