Sigmoid mala: lefelo, litšobotsi anatomical

Sigmoid mala (SK) e nkoa e le karolo e ka tlaase ea mala, e leng e ntse e feta ka mala, ka hona, ho kopanelang papaling ea ho ka tshebetso ya ho tsamaisa le masi le felisoa bona morago ga moo e ho tloha 'mele oa motho.

Ho le joalo, sebaka seo ha sigmoid mala e sebakeng se haufi le se qalang ka holimo ea ka beisine e nyenyane, e ile a laela laterally ho lehlakoreng le letona ho krestsu, moo bo fellang kateng ka ho le letšehali 'me a fihla mola bohare tsoela fatše, moo ka vertebra boraro krestsovogo fetelang ka ho rectum ena. Tabeng ena, bolelele ba eona ranges ho tloha disentimetara mashome a mabeli ho mashome a supileng a metso e mehlano (tseo hangata palo ena ke lekanang le a ho disentimetara mashome a mane a metso e mehlano).

Sigmoid mala o bo itsetlehile flexure tse peli tse theohelang ka noka ena. The boholo le ka sebōpeho sa loops tsena e fapaneng le itšetlehile ka sebōpeho sa 'mele oa motho, ba ile ba ba le haufi le ho siea ilium, le theohela ka cavity pelvic, le e mong oa bona li shebile fatše,' me e mong - ho fihlela. Ke ka lebaka leo sigmoid mala tlholeho S- hare. Maemong a mashome a supileng ho tsoa lekholo bolelele ba edy sekgoqetsane fapana ho disentimetara mashome a mabeli a metso e mehlano ho mashome a mane a metso e mehlano, e bitsoa normosigma. Haeba boholo ba eona ke emetse disentimitara ka tlase ho mashome a mabeli a metso e mehlano, bitsoa sigmoid mala brahisigmoy. The bophara ntle tse tsheletseng mala santmetrov Leha ho le joalo tabeng ea feteng boholo ena, e ka pheha khang ea hore marako a oona a thatafetseng.

SC peritoneum koahetsoeng ka mahlakoreng 'ohle' me o na le mesentery, i.e. le lesaka, ka ho eo intestine e secured ho leboteng ka mpeng ea disentimetara lesometlhano telele, e leng e fana ka ka ho eona le tsamaiso e khōloanyane. lesaka lena ka sebopeho lona na likarolo tse ling tse peli tse, e-ba bolelele ba emetse disentimitara robeli, e mong - ho tse leshome. Ke ka lebaka leo edy na le matla a ho fallela ka cavity pelvic, 'me ka tataiso ea ho mala kapa sebete. Hlokomela hore intersects mesentery ureter, popelo le iliac lijana sebakeng bokaholimo lehlakoreng hammoho le lumbar le iliac mesifa, ho le letšehali sacral kopanetsoeng. Eaba o susumelletsa ho holim 'a lefapha vertebral krestsovogo le e qetella ka vertebra boraro.

Sigmoid mala, lefelo la eo dumella hore ho tla ka kopana le intestine nyenyane kapa ho spliced le bona adhesions, e se eka hape tla ho kopana le ba boholong tsohle jwalo ka mpeng (ntle manyeme) hammoho le ea cavity pelvic.

Re lokela ho hlokomela hore hangata (haeba e telele mesentery) sigmoid mala susumelletseha ka iliac fossa, kahoo o lokela ho ba khona ho khetholla ho tloha cecum le. Etsa hore ke se thata, feela lokela ho hopola hore ho fallela hole le SC dithulaganyo pata hore ha li ka intestine foufetseng.

Hang hape, re hatisa hore e sigmoid mala, e leng sebaka ea eona e hlalositsoeng ka holimo, o na fetohang phetoho le human anatomy, ha ba ntse ba zaviyast tsa dithulaganyo le tse etsahalang ho eona, hammoho le 'mele oa motho, libōpeho lilemo lona le lintho tse ling tse ngata.

Ho fetoheng molaong ho theoha mala sigmoid hlokomela narrowing tsa lumen e, ketsahalo ena e bitsoa sphincter tsa Bali. Ho e teng ka holimo a tsa iliac lesapo le nang le e-ba bolelele ba emetse disentimitara ho fihlela ho tse peli. Kahoo, le bophara ba le ka ntle la seso le, lutse ka mor'a libaka e tsoang ho eo disentimetara tse peli ho tse 'nè,' me sebakeng sfinkernoy - ho fihlela ho disentimetara tse peli.

E boetse e le sebaka sa sigmoid mala sfinkera (lumen narrowing) e na le bohareng, sebopeho sena se bitsoa sphincter Myute, empa e ka ba ile ba fallela ka ho eketsehileng ho tloha bohareng ba eona. Tabeng ena Link bophara intestine bakeng sa libaka ena li entsoe ka emetse disentimitara tse peli ho tse tšeletseng, 'me ka Myute libaka - ho tloha ho disentimetara tse tharo.

Kahoo, hona joale re tseba se feela moo sigmoid mala, empa hape makgetheng lona anatomical. E phetha karolo ea bohlokoa ka 'mele oa motho.