Sigmoid muura: nzvimbo, iyo anatomical zvinhu

Sigmoid muura (SK) anonzi kuva rezasi chikamu muura, izvo zvinoenda muura, saka, izvozvo paChikoro muitiro rokutakura faeces uye kwavakazoita kubviswa kubva mumuviri womunhu.

Saka, nzvimbo sigmoid muura iri pedyo yokumusoro kuvhurika mumudziyo wokugezera duku, zvinonzi akatungamirira laterally kurudyi divi kuti krestsu, ipapo anotendeukira kuruboshwe uye kusvika muMedhia akapiwa mutsetse rovira, apo panguva vertebra wechitatu krestsovogo zvinoenda mugaranhoko. Muchiitiko chino, kureba kwayo anoda kubva maviri kusvika makumi mashanu masendimita (kazhinji mufananidzo uyu yakaenzana mana nemashanu masendimita).

Sigmoid muura ane mbiri flexure zvamagonhi vanoburukira kupinda chiuno. The ukuru uye chimiro zvishwe izvi vakasiyana uye kunoenderana nemamiriro muviri womunhu, ndivo yakabatana kuruboshwe ilium, uye uchaburukira pelvic mhango, mumwe wavo akatarisa pasi, uye vamwe - kumusoro. Ndokusaka sigmoid muura yokusafa S- kuumbwa. Makumi manomwe zviitiko kubva zana pakureba IC loop zvichisiyana maviri nemashanu kusvika makumi mana namashanu masendimita, kunonzi normosigma. Kana saizi yayo idukusa-maviri nemashanu masendimita, yainzi sigmoid muura brahisigmoy. The yokunze Zvisinei pakuparwa zvikuru kukura uku dhayamita matanhatu muura santmetrov, unogona angapokana kuti masvingo aro thickened.

SC peritoneum wakafukidzwa kumativi ose uye ane mesentery, i.e. mudanga, ayo ura iri richengetwe kusvikira abdominal rusvingo gumi masendimita refu, iyo inopa nokuripisa zvikuru mufambo. ukagunzva ichi ayo mamiriro ane migove miviri, kureba masendimita sere, mumwe - pa gumi. Ndokusaka IC anokwanisa kufamba ari pelvic mhango, uye vari kutungamirira dumbu kana chiropa. Cherechedza kuti intersects mesentery ureter, ovarian uye iliac midziyo iri kudivi hukawanika uyewo lumbar uye iliac tsandanyama, kuruboshwe sacral rwakashodoka. Akabva kunoita kuti pemvura vertebral krestsovogo dhipatimendi uye rinoguma yechitatu vertebra.

Sigmoid muura, nzvimbo iyo inoita kuti apinde neVadzidzi ura duku kana kuti spliced navo adhesions, kunogona kupinda nevanhu vakuru zvose sezvo abdominal (kunze rwatata) uyewo pelvic mhango.

Zvinofanira kucherechedzwa kuti kazhinji (kana refu mesentery) sigmoid muura iri ndanogara iliac fossa, saka unofanira kukwanisa kusiyanisa kubva cecum. Ita hazvina kuoma, chete vanofanira kuyeuka kuti kutamira kure SC stuffing pezvakaitwa kuti vasiri ura bofu.

Kamwe zvakare, isu simbisa kuti sigmoid muura, nzvimbo iyo kunorondedzerwa kumusoro, ane unochinja Morphology uye anatomi, sezvo ivo zaviyast pamusoro pezvakaitwa kuti kuitika mairi, uyewo muviri, zera wayo zvinhu uye zvimwewo zvakawanda.

At yezwi uchiburuka muura sigmoid vakachengeta aienda pamusoro lumen, chiitiko ichi anonzi sphincter pakati Bali. It riri pamusoro iliac mapfupa uye ane kureba masendimita maviri. Saka, chokunze dhayamita ari urikanwi, riri shure kuti mapazi ari maviri kusvika mana masendimita, uye sfinkernoy nharaunda - kusvika masendimita maviri.

Uyewo nzvimbo sigmoid muura sfinkera (lumen aienda) ane pakati, mamiriro ichi anonzi sphincter Myute, asi kunogona kuzununguswa mberi kubva pakati. Muchiitiko ichi zvokunze dhayamita ura kuti mapazi aya akaumbwa maviri matanhatu masendimita, uye muna Myute mapazi - kubva kune masendimita matatu.

Saka, isu zvino hatizivi chete apo sigmoid muura, asi zvaro anatomical zvinhu. It inoita basa rinokosha mumuviri womunhu.