Lo mzimba usebenza kanjani kubantu?
Isisu sesifinyelele esakhiweni esifanayo, kokubili amadoda nakwabesifazane. Kodwa-ke, ngobulili obunamandla ngokushesha ngemuva kwesibeletho yi-rectum, ehambisana nayo. Kulaba besifazane ngemuva kwalesi sitho esinamandla kuyisisindo . Kumele futhi kuthiwa labesifazane banesifo se-urogenital ngaphansi kwesihenqo, futhi i-prostate gland kubantu.
Esikhathini esingaphandle kwesigcawu, kuyisiko ukuhlukanisa izindonga zangaphakathi, zangemva nasemuva. Ngesikhathi esifanayo, ngenxa yezici zayo ezibonakalayo, ingxenye engaphezulu yelungu iyiselula kakhulu kunomunye ophansi. lo mkhakha ugcinwa yizibopho. Lapho isifiso sigcwele umchamo, udonga lwaso oluphezulu lukhuphuka futhi luhamba ngaphezu kwe-pubis. Ngesikhathi esifanayo, i-peritoneum iphakanyiswa, kanti isifiso siyashintsha isimo sayo futhi sifana neqanda elikhulu.
Ingxenye ephansi, ebanzi yesibindi, ebizwa ngezansi, ibheke phansi futhi ibuyele emuva ngokuphathelene ne-rectum. Ingxenye ephakathi kwalesi sitho, ebizwa ngokuthi umzimba, ngokuya kancane igxila emdongeni wangaphakathi lwesisu, yenza i-tip okuthiwa yesikhumba. Engxenyeni yangaphakathi yezansi kukhona izimbobo ezi-3: imilomo emibili ye-ureters kanti yesithathu yi-urethra.
Uma sicabanga ngesakhiwo sesisindo somuntu, umuntu akakwazi ukusikisela ukuthi yiziphi izindonga zalo. Ngaphandle zimbozwe ngekhanda elimangalisa, ngaphansi kwe-submucosa. Isendlalelo esilandelayo yi-muscle ne-serosa. Kulesi simo, indawo enamanzi ihlanganiswe ne-epithelium yesikhashana, okubangela ukubizwa okubizwa ngakho. Kuyizindleko zakhe, ivolumu yalo mzimba, inganda izikhathi eziningana.
Ingqamuzana yemisipha yelungu limelelwa izingxenyana zesikhathi eside, eziyindilinga nezingaphakathi zangaphakathi ze-oblique-longitudinal, ezisondelene kakhulu. Kule nkinga, isendlalelo esiphakathi esifundeni sesisindo (ingxenye lapho ukuhlunga kwayo kwenzeka) ezungeze ukuvulwa kwangaphakathi kwe-urethra kuyakha i-sphincter yangaphakathi. Yile nhlangano ebhekene nokugcinwa komchamo ngaphakathi kwesinye.
Uma siqhathanisa isakhiwo sesisu kubesilisa nabesilisa, kubalulekile ukuqaphela lezi zici ezilandelayo:
- emadodeni kuphakeme ekhanda elincane, kwabesifazane liphansi;
- emadodeni - phambi kwebesifazane kanye nama-ureters, emadodeni phakathi kwethambo le-pubic ne-rectum;
- ubude besisu - 3-4 cm, owesilisa - cishe 20 cm.
Kuyini isirabhu?
Naphezu kwesakhiwo esilula, lo mzimba udlala indima ebalulekile emzimbeni womuntu. Ngokusekelwe kwesakhiwo sesikhumba, ungabiza imisebenzi yakhe esemqoka nenhloso. Phakathi kwabo kukhona:
- i-reservoir;
- ukuphuma.
Umsebenzi wokukhishwa kwesigungu uwenziwa ngenxa yokunyakaza kwezivumelwano ze-muscle fibers of the vestiva, futhi ngenxa yethonya elicasulayo kuma mechanoreceptors we-urethra.
Futhi phakathi kwemisebenzi ingabizwa ngokuhlanganyela ngokungaqondile komzimba ekugcineni isimo semvelo sangaphakathi, ngokususa imikhiqizo ye-metabolism.