Sistem sakulasan ne sistem ba a rufe, kuma rufe

Jijiyoyi (da ba-rufe da rufe) ne inji ta da aiwatar da yiwu co-ordinated motsi na jini (hemolymph) na jiki, wadda tabbatar da cikakken rai. Its sosai motsi a cikin tsarin taso daga pulsation na zuciya tsoka ko rage thickening na ganuwar da lakã da jijiyoyi, ko gabobin jiki motsi da kuma tsoka. Shi ne ta hanyar da wurare dabam dabam kai daga abubuwa na faruwa da zafi musayar matakai domin influencing da rayuwa kudi. Rufe ko bude jijiyoyi: yadda suka sãɓã wa jũna, kuma ga wanda suke halayyar? Amsoshin wadannan tambayoyi da za a tattauna a cikin labarin.

Sistem sakulasan ne sistem ba rufe da aka samu a kusan duk kwaro, kazalika a ƙananan chordates (Amphioxus a). Jini ya kwarara a cikin wadannan kwayoyin ne ya sa ta rage daga cikin zuciya, ko "zukata", kazalika, wasu har, rage tsokoki na jiki. A halayyar alama - wani babban adadin jini a wata low gudun ta motsi.

An Rufe jijiyoyi iya kunshi wani guda wurare dabam dabam (kifi da cyclostomes) da kuma biyu - ƙanana da manyan (dabbobi masu rarrafe, halittar dabba mai kafafuwa, da tsuntsaye, dabbobi masu shayarwa). Sunã gudãna da kananan da manyan da'irar jini lokaci zuwa lokaci canza abun da ke ciki, da kuma shi ne venous, jijiya da wani abu. A banda kisan gillar da dabbobi, har ma a gauraye venous da jijiya ko aortic zuciya, da jini ya kwarara kudi ne low. A musayar abubuwa tsakanin jini da kyallen takarda na jiki da za'ayi ta hanyar bakin ciki capillary katangu. Tacewar bazuwar kayayyakin faruwa da farko a cikin kodan, ko wasu rabuwa da jikin.

Sistem sakulasan ne sistem ba rufe sosai ajizai ne, amma a cikin 'yan cikin rufaffiyar jijiyoyi mafi manufa a cikin tsuntsaye da masu shayarwa. A wakilan wadannan azuzuwan kunshi biyu hudu gidajen zuciya da kuma wurare dabam dabam. Yadda aka saba, da jijiya da jini da aka taba gauraye da venous jini. Characteristically isasshe high matsa lamba. Wani amfani - wani babba kudi na jini ya kwarara ta hanyar tasoshin (idan aka kwatanta da wannan lokaci da jini wurare dabam dabam a cikin kwari ne kamar 22 minutes, da kare - wannan shi ne 16 seconds, da kuma wani zomo - 7.5 seconds). Shi ne da godiya ga wadannan siffofin zai yiwu dumi-bloodedness na mafi girma jinsin dabbobi, wanda damar domin ci gaba da yanayin jiki, ko da kuwa da muhalli da yanayi. Peculiar ga tsuntsaye da dabbobi masu shayarwa da kuma wani babban rayuwa yadda ya dace.

Jini zagayawa a cikin jikin mutum da aka bayar da ƙanƙancewa na zuciya, wanda aiki kamar famfo. Daga cikin sauran abubuwan bayar da tasu gudunmuwar da motsi na da jini - numfashi ƙungiyoyi, Munã rage ta kwarangwal tsoka, da matsa lamba bambanci a cikin tasoshin. Daya daga cikin halaye na cardiac aiki - zuciya rate. Pulse - wani lokaci-lokaci tsawo daga cikin jijiyoyi, wanda ya yi daidai da contractions daga cikin zuciya tsoka. Its mita dogara a kan al'amurra da dama, ciki har da jiki nauyi, zafin jiki da kuma jihar na jiki, jiki da kuma wani tunanin danniya, da sauransu. A al'ada zuciya rate ga ya fara tasawa ne 60-80 lashe minti daya. A sãɓãwar launukansa kudi na jini ya kwarara a tasoshin daga kasa da 1 mm / sec a capillaries na 50 cm / s, a manyan jijiyoyi. Dukan wurare dabam dabam na jini a ko'ina cikin jiki ne kamar 20-25 seconds. Jini motsa downward matsa lamba ne mafi girma a cikin lakã da manyan jijiyoyi da karami, ko da korau, a cikin m jijiyoyinmu. Baya da motsi na jini da kuma hana bawuloli wanda rufe atrioventricular orifice, bakin huhu jijiya da kuma lakã, da kuma bawuloli suna located a kan ganuwar da manyan jijiyoyinmu. Lokacin da isasshen na contractile aiki na zuciya jini ya kwarara da aka ba a gaji da damuwa.

Kamar yadda ka gani, da jijiyoyi ba rufe da rufe da sosai musamman siffofin da suke tabbatar sani kowane Malamai, kuma ba kawai da mutum.