Purkinje fibers mumwoyo

mwoyo yedu - mhasuru kuti ane basa rakasiyana nemamwe chaizvo mashandiro kuti marwadzo. Inside iri kunzwisisa hurongwa masero chaiwo (pacemakers), iro rine multi-pamwero kushanda kudzora hurongwa. Ndicho uwandu zvinoshandisa pakurima uye Purkinje fibers. Ivo dziri muna ventricular myocardium uye vane basa ravo synchronous marwadzo.

General anatomi of vascular hurongwa

Cardiac conduction gadziriro iri conventionally muzvikamu mana anatomists. Chikamu chokutanga anotipa sinoatrial (sinoatrial) raiva pedyo nebundu. It kunosanganisira tsapo matatu masero izvo chamutsa pulses ane kakawanda masere - zana namakumi maviri nguva paminiti. Kasira Izvi zvinoita kwemwoyo kuramba yakakwana kweropa mumuviri, saturation pamwe okisijeni uye metabolic zvazvingava.

Kana kuti zvimwe chikonzero yokutanga pacemaker haagoni kuita ayo basa, izvozvo Zvinotora atrioventricular (atrioventricular) raiva pedyo nebundu. It riri pamuganhu mwoyo makamuri mukati partition. sumbu Masero aya ndiyo kakawanda mwero kuwanda shamhu makumi matanhatu kusvika makumi masere uye anonzi kechipiri kuti pacemaker.

Inotevera pachiyero conduction mugadziriro - ndiwo mutundu wake uye Purkinje fibers. Ivo dziri muna interventricular septum uye entwine zviri chakaderedzwa mutengo mwoyo. Izvi zvinoita kuti ukurumidze kuparadzira zvemagetsi zvinodiwa ventricular myocardium. urwu havukavu zvichisiyana mana kusvika makumi matanhatu nguva paminiti.

ropa zvitengeswa

Zvikamu conduction ino, izvo dziri muna atria, vanogamuchira zvokudya kubva vakaparadzana manyuko, aparadzane vamwe myocardium. Sinoatrial raiva pedyo nebundu chikafu arteries akadukupa kana mbiri dziri gobvu masvingo mwoyo. Feature ndiyo kuvapo tsinga disproportionately guru iro inopfuura napakati raiva pedyo nebundu. bazi iri kurudyi coronary tsinga. Iyewo, anopa zvakawanda zviduku pamatavi kuti vanoumba gobvu samambure arterial-venous iyi munharaunda atrial tishu.

Chiputu kwake uye Purkinje fibers, zvakare, vari dzinofambiswa ne mapazi rworudyi coronary tsinga (mukomana) kana zvakananga kubva pacharo. Mune zvimwe zviitiko, ropa zvibudire kupinda nemamiriro kubva circumflex tsinga. Panewo vakaumba gobvu richikurukura capillaries kuti vari zvakasimba entwine cardiomyocytes.

Masero wokutanga mhando

Kusiyana pakati pamakamuri, vari chikamu conductive ezvinhu, nokuti kuti vane zvakasiyana mabasa. Kune mhando huru nhatu masero.

Mukusarudza pacemakers vari n masero kana masero wokutanga mhando. Morphologically, ndiko diki mhasuru masero ane hombe neerekitironi yakawanda nhungirwa refu, zvakanyatsobatana. Masero vanoverengeka pedyo inokurukurwa sesumbu, vakabatanidzwa nevakawanda pakakwirira membrane.

Kuti vaunze mumwe marwadzo ari nechomukati svikiro P masero akaronga tsapo ose myofibrils. zvinhu izvi ndiwo zvinenge kota zvachose nzvimbo yacho cytoplasm. Other organelles randomly dzinongoda mukati muchitokisi uye duku pane chaiye cardiomyocytes. A chubhu cytoskeleton, Ukuwo, zviri vakaronga dzine uye kuramba chimiro pacemakers.

Kubva masero aya chine sino-atrial raiva pedyo nebundu, asi vamwe zvinhu, kusanganisira Purkinje fibers (histology izvo zvichashandiswa kurondedzerwa pazasi) akasiyana yakarongeka.

Masero rechipiri mhando

Vanewo kunzi Kuchinja kana Isimba rakadini rinogona kubudiswa pacemakers. Irregularly zvakaumbwa, mapfupi pane zvakajairika cardiomyocytes, asi kuva mukuru ukobvu afadzewo nuclei maviri, uye muchitokisi masvingo vane mukudzokera yakadzika. Organelles mumasero izvi pane ari cytoplasm nemasero n.

The contractile shinda rakareba refu akabatana muchitokisi. Ndivo mukobvu uye vane yakawanda sarcomeres. Izvi zvinobvumira kuti vatyairi rechipiri-murayiro unodiwa. Masero akarongwa Data atrioventricular raiva pedyo nebundu uye chiputu kwake uye Purkinje fibers masiraidhi nezuva retatu mhando masero dzinoturwa.

Masero wechitatu mhando

Histology akaratidza Mhando inoverengeka masero ari chinouraya chikamu cardiac conduction hurongwa. Maererano kupatsanura wechitatu muchitokisi mhando kukurukurwa pano achava akafanana nemamiriro avo anoumba Purkinje fibers mumwoyo. Vanonyanya voluminous pane dzimwe pacemakers, refu uye rakapamhamha. Ukobvu dzinosiyana myofibrils pa internet zvikamu zvose, asi uwandu contractile zvinhu mukuru mune kuipa cardiomyocytes.

Zvino tinogona enzanisa wechitatu mhando masero neavo anoumba Purkinje fibers. Histology (gadziriro vakawana kubva munyama mwoyo chakaderedzwa mutengo) pakati zvinhu izvi zviri zvakasiyana. Chinoumba ane substantially rectangular chimiro, uye contractile faibha yakatanga zvikuru kusimba, uye vane mapazi vakawanda interconnected. Mukuwedzera, havasi kufunga zvakajeka pamusoro kureba sero uye akaronga panguva refu zvikamu. Kunyatsoteerera chitsama organelles izvo akaronga akapoteredza myofibrils.

Kusiyana kakawanda pakati vanowanika pulses uye kumhanya kuurayiwa yavo, vanoda phylogenetically dzakabudirira yaunonyanya kushandisa mashandiro panguva muitiro kuderedza zvikamu zvose zviri mumwoyo.

Histological kusiyana conduction hurongwa cardiomyocytes

Mumasero mhando rechipiri uye rechitatu vane chikuru yakawanda glycogen uye metabolites ayo pane kwomuzvarirwo cardiomyocytes. Nyaya iyi iri chakagadzirirwa mapurasitiki zvakakwana kufukidza muchitokisi nerevane inotonhorera zvinodiwa. Makemikari mhosva glycolysis uye glycogen usage, zvikuru mubasa mumasero conduction hurongwa. Iri kushanda mwoyo masero vakachengeta pakatarisana muenzaniso. Nokuda chikamu ichi nyore kutapudzwa hurukuro okisijeni Kutamiswa pacemakers, kusanganisira Purkinje fibers. Kwegadziriro kuitisa ezvinhu pashure Mabatirwo mishonga vanoshingaira zvinhu zvinoratidza yakakwirira basa pamwe holineserazoy uye lysosomal makemikari.