Weti dundira ndeimwe yenhengo dzakakosha dze excretory system mumuviri wemunhu. Kunyange zvazvo itsvo dzine mutoro wekugadzira weti, bladder ndiyo inokonzera kuchengetedza kwayo uye kudzingwa kwekupedzisira. Dundira riri muchikamu chezasi chedumbu, munzvimbo yepubic - nekuda kwekuhwanda uku, inogona kuzvidzivirira kubva mukukuvadzwa nemapfupa epelinha akapoteredza. Kana dundira risina chinhu, rinotora chimiro chefunnel yakakura kumusoro uye kutetepa pasi, asi kana yakazara inova spherical form. Kuwanda kwedundira kunonyanyo temwa nechimiro chemuviri, asi kazhinji huwandu hwayo huri pakati pe0,4 ne0,6 litres.
Urinary bladder - anatomy
Chimiro cheurinary bladder inoratidza kusachengeteka kwayo uye akawanda anodzivirira akaturikidzana, kudzivirira kubva mukukuvadzwa, semuenzaniso kubva kumapfupa epelvic. Inovakwa zvakanyanya nemhasuru dzakatsetseka, dzinobatanidza tishu uye tsinga dzeropa, muchimiro chayo tinosiyanisa kumusoro, shaft, pasi uye mutsipa. Madziro edundira ane mitsara mitatu - yekutanga inodzivirira layer, yekunze, inonzi serous membrane, iyo iri pakati - pakati pekunze nemukati - kureva pakati (muscle tissue) uye yemukati. , kureva serous membrane. chinhu chakakosha chimiro chedundira ndiwo musimboti wayo waanogadzira detrusor tsandanyama kubvumira kuchinja kwekusununguka kwechimiro chenhengo kumativi ose. Kuzasi chaiko kwedundira kune urethra, iyo inozopedzisira yaburitsa weti kubva mumuviri wemunhu. Kune varume, mamiriro acho akanyanya kuoma mune izvi, nekuti dundira anatomy inofungidzira kuti coil inopfuura nepakati peprostate gland, iyo inonzi prostate. Uku ndiko kunokonzera matambudziko mazhinji munzvimbo iyi maererano nekuita weti. Kazhinji kazhinji pane kuwedzera kwegland uye kunokonzerwa neizvi kumanikidza pacoil. Izvi zvinowanzokonzera kudzikiswa kwerukova, uye muzviitiko zvakakomba, kutadza kuita weti zvachose. Chinhu chinonyanya kukosha chechimiro cheurinary bladder ndiyo urethral sphincter, nokuti ndeyekutenda kuti zvinokwanisika kudzora kubuda kwemuti. Imhasuru inogara ichichengetedza tension, nekuda kwekuti kuvhurwa kwe urethra kunovharwa panguva yekuchengetedza weti. Basa rayo rinonyanya kukosha mumamiriro ezvinhu apo kune kuwedzera kamwe kamwe mukumanikidzwa munzvimbo yedumbu - kunyange panguva yekuseka kwekuseka, kukosora, kusvuta. Sphincter inogona kudzivirira kubuda kweweti kusingadikanwi kuburikidza nekumanikidzika kwechisikigo.
Urinary bladder - usaende usina iyo
Muviri wemunhu unoshanda nenzira yekuti unongounganidza weti wozoiburitsa. Ndiyo nhengo inobatsira mukuzadzisa mabasa aya dundira. Zvinokutendera kuti uchengetedze mvura yakasefa, uye ndatenda sphincter kurichengeta pasi pesimba. Pakupedzisira, ibasa dundira inoita kuti weti ibude. Nzvimbo dzinotarisira mabasa aya dziri mutsinga dzetsinga - mucerebral cortex, musana, mune peripheral ganglia. Apa ndipo panopinda masaini dundira richizara. Capacity dundira nokuti haina muganhu. Kana iyo fluid ichizadza mu 1/3, ipapo zviratidzo zvinoyerera kubva kune zvinogamuchira dundira madziro zvakananga kune cerebral cortex, iyo inoratidza kudiwa kwekuita tsvina. Kana munhu wacho akasaita uye akasaita weti, zviratidzo izvi zvinowedzera simba, zvichiita kuti anzwe kuda kukuru, dzimwe nguva kunyange kurwadza. Panguva imwecheteyo, basa rinoitwa panguva ino chaiyo urethral sphinctersizvo zvinodzivirira kubuda kusingadiwi kweweti. Kana defecation ikagoneka pakupedzisira, nzvimbo dzetsinga dzinomira kutumira masaini anotyisa ekuvharira, sphincter kukamhina uye weti inoburitswa. Kana ura hwapera, nhengo dzomuviri dzinobatirana zvakare, dzichigadzirira kuunganidzwa kunotevera kweweti mudundira.