Umutima
Umutima w'umuntu uherereye muri mediastinum, ku rwego rwa thoracic vertebrae T5 - T8 . agace y'ibice bibiri yitwa pericardium Gakikije umutima kandi ifata mediastinum. [1] Ubuso bw'inyuma bw'umutima buryamye hafi y'inkingi ya vertebral, naho ubuso bw'imbere buzwi nk'ubuso bwa sternocostal bwicaye inyuma y'igitereko n'imbavu . [2] Igice cyo hejuru cy'umutima nigitekerezo cyo guhuza imiyoboro minini yamaraso- venae cavae, aorta nigitereko cyimpyiko . Igice cyo hejuru cy'umutima giherereye ku rwego rwa gatatu ruhenze. [2] Umutwe wo hasi w'umutima, apex, uryamye ibumoso bw'inyuma (8 kugeza 9 cm kuva ku murongo wo hagati) hagati y'isangano y'imbavu ya kane nuwa gatanu hafi ya articulation hamwe na karitsiye ihenze. [2]
Umutima usohora amaraso hamwe nigitekerezo cyagenwe nitsinda rya selile pacemaker muri sinoatrial node . Ibi bibyara umuyoboro utera umutima kwandura, ukanyura kuri node ya atrioventricular no muri sisitemu yo gutwara umutima . Mu bantu, amaraso ya dexygene yinjira mu mutima binyuze muri atrium iburyo uhereye kuri venae cavae isumba iyindi kandi ntoya hanyuma ikayigeza kuri ventricle iburyo. Kuva aha, byinjizwa mu kuzenguruka kw'ibihaha kugera mu bihaha, aho byakira ogisijeni kandi bigatanga dioxyde de carbone. Amaraso ya Oxygene noneho asubira muri atrium ibumoso, anyura muri ventricle yi bumoso hanyuma asohorwa muri aorta mu kuzenguruka kwa sisitemu, agenda anyura mu mitsi, arterioles, na capillaries - aho intungamubiri n’ibindi bintu bihanahana imiyoboro y'amaraso na selile, bikabura ogisijeni na kubona dioxyde de carbone-mbere yo gusubizwa mumutima binyuze mumitsi no mumitsi . [8] Umutima utera ku kigero cyo kuruhuka hafi 72 gukubita ku munota. [3] ngororamubiri yongera umuvuduko by'agateganyo, ariko igabanya umuvuduko w'umutima kuruhuka mu gihe kirekire, kandi ni byiza ku buzima bw'umutima. [4]
Imiterere
[Hindura | hindura inkomoko]imiterere Ibyumba byumutima
[Hindura | hindura inkomoko]
Umutima ufite ibyumba bine, atriya ebyiri zo hejuru, ibyumba byakira, hamwe na ventricles ebyiri zo hepfo, ibyumba bisohora. Atriya ifunguye mumashanyarazi ikoresheje atrioventricular valve, igaragara muri septum ya atrioventricular . Iri tandukaniro rigaragara no hejuru yumutima nka coronary sulcus . [5] Hariho imiterere imeze nkugutwi muri atrium yo hejuru iburyo yitwa umugereka wiburyo wa atrial, cyangwa auricle, nundi muri atrium yo hejuru ibumoso, umugereka wibumoso . [19] Atrium iburyo hamwe na ventricle iburyo hamwe rimwe na rimwe byitwa umutima wukuri . Mu buryo nk'ubwo, atrium ibumoso hamwe na ventricle ibumoso hamwe rimwe na rimwe byitwa umutima wibumoso. [6]] Umutima utandukanijwe hagati ya septum interventricular septum, igaragara hejuru yumutima nka sulcus ya longitudinal imbere na sulcus interventricular sulcus . [7]
Referances
[Hindura | hindura inkomoko]
