Tsarin siginar jiki, wanda aka fi sani da tsarin kwakwalwa ne, mai sauƙi ne wanda ya fara, ya ƙare, tare da zuciyarka. Yana da tsarin rufewa, ma'ana jini bata shiga ko bar tsarin yayin tafiya daga zuciyarka ga jikinka ba kuma baya. A cikin irin wannan tsarin, za'a iya motsawa a cikin madauki sau ɗaya kuma a sake.
An zubar da jini a jikinka ta hanyar jikinka- arteries , arterioles, da capillaries - kuma sun sake komawa zuciyarka ta hanyar zubar da kwayoyin cuta da ɓoye. Jininka yana da mahimmanci ga lafiyarka kuma yana yada abubuwan gina jiki ciki har da electrolytes, oxygen, carbon dioxide da amino acid cikin jikinka. Zuciyarku tana da alhakin mafi yawan ayyukan siginar da kuma inda aka fara aiki.
Yanayi ya fara a cikin zuciyarka
Tsarin tsawaita jiki yana farawa a damanka na dama, babban ɗakin hannun dama na zuciyarka. Yayin da jini yana motsawa cikin zuciyarka, yana wucewa ta kowane ɗakin dakuna hudu (dama na dama, dama dama, hagu na hagu, hagu na hagu), yana dauke da hanzari ga huhu don kawar da carbon dioxide kuma karbi oxygen, kuma ya ƙare a cikin hagu na hagu, wanda ake kira ventricle hagu.
Lokacin da yazo game da rarraba jini a jikinka, hagu na hagu shine ɗakin da ya fi muhimmanci a zuciya.
Ƙungiyar hagu na hagu ita ce mafi girma daga cikin ɗakuna huɗu kuma yana da alhakin samar da karfi da ake bukata domin yada jinin daga jikinka, jinin farko da jini ya shiga kamar yadda ya bar zuciyarka.
Daga Aorta zuwa Capillaries
Jininka yana tafiya daga aorta ta hanyar jerin ƙananan jini har sai ya kai gashin ka.
Kafin kai galanka, dole ne jini ya yi tafiya a cikin arterioles, inda za'a yi saurin gudu da matsa lamba yayin da sassa daban-daban na gyare-gyare suka canza diamita don amsawa ga matsa lamba da na'urorin sunadarai da aka sanya a kusa. Wadannan na'urori masu auna sigina na daidaita tsawan jini ta hanyar daji don amsa yanayin canza yanayin cikin jiki.
Saboda aikin gyare-gyare, lokacin da jininka ya kai gashin ka, ba ya tafiya a cikin tsarin da ke motsawa. Jinin yana gudana ta cikin capillaries, ba sa "squirt" da kuma "hutawa" kamar yadda zuciyarka ta damu. Wannan ci gaba ya zama dole saboda akwai musayar oxygen da kuma na gina jiki a cikin ganuwar murya. Babu kwayar halitta a cikin jikin da ke kusa da capillary.
Komawa ga Zuciyarku da Duk Kasa
Yayin da jini ke tafiya ta cikin capillaries, ana samar da iskar oxygen kuma ya ɗauki kayan sharar gida. Daga capillaries, jini ya shiga raƙuman ruwa, raguna, sa'an nan kuma ya koma cikin zuciya don a kwantar da shi kuma ya sake aikawa sake.
A ƙarshe, zuciyarka tana aiki kamar famfo wanda ya ba da kayan gina jiki ga kowane kwaya, nama, da tantanin halitta a jikinka. Hakanan, ɗakunku suna jefa kayan sharar gida, kamar carbon dioxide, baya cikin jininku don dawowa zuwa zuciyar ku.