Jijiyoyi

Sistem sakulasan ne sistem a wuya rufaffiyar cibiyar sadarwa kunsha na biyu da'irori (jijiya ko venous da kuma kananan da manyan) Sistem da kuma "tsakiyar famfo" - zuciya.

All tasoshin kasu kashi a jijiya, da karami jini (capillaries), kuma jijiyoyi. Recent rahotanni aiki a matsayin sunadarin oxygen-wadãtar, "tsabta" jini ya gabobin da kyallen takarda. Jijiyoyi ne mafi yawa kayayyakin da suka m ɓullo da murdede gashi. Jijiya jini tsarin hada manyan tasoshin, disintegrating cikin karami (arterioles), wanda a nuna samar da mafi kyau capillaries cibiyar sadarwa. Sun kwashe tõzarta sha da kadaici da amfani kayayyakin da oxygen. Ta hanyar capillary arterioles fili sanya tare da jijiyoyinmu a kyallen takarda.

Venous jijiyoyi ne ke da alhakin samar da outflow cikakken tare da carbon dioxide jini. Ga waɗannan kwanoni da jini ya koma zuwa ga zuciya. Matsakaici da kuma kananan jijiyoyinmu da bawuloli hana samu (baya motsi) na jini.

Zuciya buga wani m murdede sashin jiki da hudu da bẽnãye. Yana hada biyu atria (samun jam'iyya) da kuma biyu ventricles, aiki famfo. The zuciya ne rarraba a tsaye bangare. A hagu ventricle kuma bar atrium delimited malam bawuloli, da dama ventricle da dama atrium - tricuspid bawul. By bawul din leaflets suna haɗe da na ramin zuciya gefe na yarn tendons. The aiki na bawul - su hana baya motsi na jini.

Yana kewaye da zuciya da wani karfi da hada guda biyu daga cikin jakar - da pericardium.

Kamar yadda aka ambata a sama, da jijiyoyi qunshi biyu jijiyoyi. Sau da yawa, duk da haka, masana sun ce, da kuma na uku - a zuciya da'irar. An ware saboda muhimmancinsa, tun da shi ne ke da alhakin harin. Fara cikin da'irar qarya a biyu jijiyoyin zuciya (jijiyoyin zuciya) arteries, da sharar gida daga tushe na hawa lakã. Shigar da zuciya myocardium, sai suka samar da wani cibiyar sadarwa na kananan jijiyoyi. A myocardium halin da fairly da kyau-ɓullo da cibiyar sadarwa na capillaries, samar da m matakai a cikin tsoka nama. Na tsokar venous jini gudana a cikin ɓangaren dama na zuciya ta hanyar da jijiyoyin zuciya jijiyoyinmu yawa. Tare da rage daga cikin zuciya tsoka jini ne ya halitta. Saboda shi ne wani yunkuri na jijiya jini.

Manyan da'irar farawa a hagu ventricle. Ƙanƙancewa na zuciya tsoka motsi inganta jijiya jini wajen lakã, sa'an nan dukan gabobin da kyallen takarda. Kamar wancan akwai wani koma sinadirai kayayyakin da oxygen jikewa na jini cell aiki da kuma kayayyakin da carbon dioxide. The tarin jini yakan faru a cikin jijiyoyinmu ta cikin capillaries. Bayan manya da ƙananan shi shiga jijiya a cikin dama atrium, rufe da manyan da'irar.

Kananan Circle samo asali a dama ventricle. Jini daga jijiyoyinmu shigar da madaidaicin atrium, gudana a cikin dama ventricle, daga abin da haske shiga cikin jijiya. Wucewa ta cikin huhu capillaries, shi yana da warware daga carbon dioxide da oxygenated zama jijiya da gudana a cikin hagu atrium.

Phylogeny na Sistem sakulasan ne sistem m, a duk vertabrate. A tsarin wannan tsarin sun hada da lakã, da microcirculatory gado (ciki har da capillary cibiyar sadarwa), jijiyoyi, jijiyoyinmu da kuma zuciya. A kan aiwatar da juyin aka lura da rabuwa da lymphatic cibiyar sadarwa. A manyan canje-canje a cikin tsarin da jijiyoyi sun hada da mika mulki daga gill irin numfashi tsari zuwa huhu Hanyar.

Sistem sakulasan tsarin cuta (jijiyoyin bugun gini cuta) mafi yawa ana bi da bisa ga irin shafa tasoshin. Alal misali, mikewa a cikin jijiyoyin bugun gini ganuwar tsokane wani aneurysm. A lakã sau da yawa ci gaba atherosclerotic ko dauke da kwayar cutar tafiyar matakai. Its katsewa iya faruwa saboda muhimmi wani rauni daga cikin ganuwar ko rauni. A na huhu arteries iya faruwa arteriosclerotic canje-canje faruwa ko nakasar munanan. Ma'anar jijiya sau da yawa rinjayar atherosclerosis. A jijiyoyinmu sau da yawa da varicose ko inflamed (phlebitis).