Cardiac tsoka - ilimin Halittar Jiki da kuma physiological siffofin

The zuciya tsoka samar da muhimmanci ayyuka na duk kyallen takarda, Kwayoyin da gabobin. Kai na abubuwa a cikin jiki ne da za'ayi ta hanyar m jini wurare dabam dabam. Yana kuma samar da tsare homeostasis.

A tsarin da zuciya tsoka

The zuciya ne wakilta biyu halves - hagu da kuma dama, kowanne daga abin da kunshi da atria da ventricles. Hagu da rabi na zuciya farashinsa da jijiya da jini, da kuma da dama - venous. Saboda haka, zuciya tsoka na hagu rabin ne da yawa thicker fiye da dama. Tsokoki na atria da ventricles rabu da fibrous zobba wanda da atrioventricular bawuloli: biyu-nadawa (hagu da rabi na zuciya) da kuma tricuspid (dama da rabi na zuciya). Wadannan bawuloli a lokacin cardiac ƙanƙancewa hana dawowar jini a cikin atria. A fita daga cikin lakã da na huhu jijiya an sanya fortnightly bawuloli, wanda ya hana da dawowar jini ga ventricles a lokacin diastole total zuciya.

Cardiac tsoka nasa ne striated tsoka nama. Saboda haka, wannan tsoka yana da guda Properties kamar cewa daga kwarangwal tsoka. Muscle fiber kunshi myofibrillar da sarcoplasmic sarcolemma.

Godiya ga zuciya ya sadar da jini ta cikin jini. A rhythmic ƙanƙancewa na tsokoki na atria da ventricles (systole) jũyar da ta shakatawa (diastole). Bi da bi canji na systole da diastole na sake zagayowar daga cikin zuciya. The zuciya tsoka tana aiki rhythmically, cewa bayar da tsarin, gudanar da agitation a sassa daban daban na zuciya

A physiological Properties daga cikin zuciya tsoka

A excitability na myocardium - ne da ikon amsa kiran lantarki, inji, thermal da kuma sinadaran samuwar kasashe. A zumudi da ƙanƙancewa na zuciya tsoka faruwa a lokacin da mai kara kuzari ya kai wani bakin kofa da karfi. Kadan hangula bakin kofa ba tasiri da kuma ba su canja suprathreshold karfi na tsokar ƙanƙancewa.

Zumudi na tsoka nama da zuciya tare da bayyanar da mataki m. Ya taqaitaccen da kuma tsawo a quickening zuciya rate deceleration.

M zuciya tsoka a takaice hasarar da ikon amsa ƙarin samuwar kasashe ko hasken dake fitowa ta fito daga tushen automaticity. Wannan shi ake kira da tsaurin ba excitable. Strong samuwar kasashe cewa aiki a kan tsoka a wani lokaci na zumunta bijirewarsu ga sa wani matsanancin ƙanƙancewa na zuciya - da ake kira wanda bai kai lashe.

Tsokar yana da siffofin a kwatanta da kwarangwal tsoka nama. A zumudi da ƙanƙancewa a cardiac tsoka šauki tsawon fiye da kwarangwal. A cardiac tsoka aerobic matakai fi resynthesis arziki mahadi. A lokacin diastole, akwai wani atomatik canji na da membrane yuwuwar a dama Kwayoyin a sassa daban daban na shafin. Saboda haka tashin hankali shimfidawa tsokoki na atria kuma ya kai atrioventricular kumburi, wanda aka dauke cibiyar automaticity II domin. Idan kashe sinoatrial kumburi (ligated, sanyaya, poisons), sa'an nan kuma bayan wani lokaci da ventricles fara zuwa mu'ãmalar mafi rare kari a ƙarƙashin rinjayar hasken dake fitowa ta tasowa a cikin atrioventricular kumburi.

Madugu na zumudi a sassa daban daban na unequal zuciya. Ya kamata mu ce cewa a dumin jiki dabbobi kudi na zumudi na atrial tsoka zaruruwa ne game da 1.0 m / s. wani conductive na ramin zuciya tsarin to 4.2 m / s. a cikin na ramin zuciya myocardium zuwa 0.9 m / s.

A halayyar siffa daga cikin zumudi na zuciya tsoka ne cewa mataki m sa a daya rabo daga tsoka nama, yada zuwa sauran shafukan.