Imicu Purkinje entliziyweni

intliziyo yethu - isihlunu ukuba unalo indlela ekhethekileyo kakhulu ukusikwa. Ngaphakathi kuyo yinkqubo entsonkothileyo leeseli ezithile (pacemakers), nto leyo eye inkqubo yolawulo ukusebenza-level multi. Yeyona inani amagalelo kunye imicu Purkinje. Bona akhiwe myocardium ventricular kwaye zinoxanduva nokuncipha kwabo yolunye.

komzimba ngokubanzi olujikeleza

inkqubo Uhanjiso wentliziyo nje ngokuqhelekileyo uwahlule ube zahlulo ezine anatomists. Inxalenye yokuqala ubalisa sinoatrial (sinoatrial) node. Kuyinto indibanisela iinyanda ezintathu iiseli abavelisa la nge frequency asibhozo - izihlandlo ezilikhulu elinamanci mabini ngomzuzu. Le isantya ivumela izinga intliziyo ukugcina igazi kwegazi olwaneleyo emzimbeni, Ukwanda mpilo kunye nezinga metabolic.

Ukuba ngenxa yesizathu esithile kwesincedisi- yokuqala ayikwazi ukwenza umsebenzi wayo, kuthatha atrioventricular (atrioventricular) node. Le ibekwe phezu komda kwamagumbi zentliziyo kwi ulwahlulo phakathi. Le klasta weeseli kukuba izinga frequency kuluhlu imivimbo amathandathu ukuya asibhozo kwaye igqalwa umyalelo pacemaker yesibini.

Inqanaba elilandelayo kwinkqubo Uhanjiso - ke umgodlo imicu bakhe kunye Purkinje. Bona ise ekudibaneni interventricular kwaye entwine enkcochoyini kwentliziyo. Oku kwenza kube lula ukuba babele ngokukhawuleza amaza wombane myocardium ventricular. Isantya odala yahluka ukusuka amaxesha amane ukuya amathandathu ngomzuzu.

igazi

Amalungu inkqubo Uhanjiso, apho ibekwe imithambo, afumana izondlo evela kwimithombo eyahlukeneyo, ngokwahlukeneyo lonke myocardium. node Sinoatrial bondliwa elinye okanye amabini imithambo ezincinane ezindongeni kwentshinyela intliziyo. Osemqoka ubukho umthambo uhlasela ezinkulu udlula esiludumbo eliphakathi. Le yesebe ekunene kwemithambo. Yena, ke, inikeza okuninzi bamasebe ezincinane benza uthungelwano oxineneyo lwemithambo-lwemithambo kule ndawo inyama atrial.

Inyanda bakhe neerhali Purkinje, kakhulu, anikwe amandla amasebe kwemithambo ekunene yenhliziyo (kumfana) okanye ngqo ngokwayo. Kwezinye iimeko, igazi kungena kwi isakhiwo kwemithambo circumflex. Kukho bakha womnatha oxineneyo emithanjeni ukuba ngqongqo cardiomyocytes entwine.

Iiseli yohlobo lokuqala

Umahluko phakathi iiseli, nto leyo eyinxalenye yenkqubo conductive, ngenxa yokuba ukuba imisebenzi eyahlukeneyo. Kukho iindidi ezintathu ezingundoqo iiseli.

abanezincedisi-ntliziyo yezikhokhelo n iiseli okanye iiseli yohlobo lokuqala. Morphologically, yinto iiseli zezihlunu encinane nucleus elikhulu kakhulu kumagqabi elide, munye. iiseli aliqela angqonge zithathwa Sisihloko, umanyaniswe inwebu ongaphantsi eqhelekileyo.

Ukujikelezisa ucutheko iiseli P lwangaphakathi medium amalungiselelo iinyanda myofibrils. Ezi zinto dla ubuncinane ngekota bendawo zizonke kukho icytoplasm. Ezinye organelles randomly elahliweyo ngaphakathi kwiseli kunye ezincinane kunokuba cardiomyocytes eqhelekileyo. A cytoskeleton tube, icala, zicwangciswe exineneyo nokugcina ukuma pacemakers.

Ukusuka kwezi seli iqulathe node Sino-atrial, kodwa ezinye izinto, kuquka imicu Purkinje (histology neya kuchazwe ngezantsi) kufuneka isakhiwo eyahlukileyo.

Iiseli ze kuhlobo lwesibini

Kananjalo ngokuba inguqu okanye pacemakers angasebenzi. Okudodobalisa ezimilise, mfutshane cardiomyocytes eziqhelekileyo, kodwa sibe ubukhulu enkulu inokuthatha nuclei ezimbini, yaye iindonga yeseli kufuneka emathambekeni ezinzulu. It organelles kwezi seli ngaphandle kokuba kukho icytoplasm iiseli n.

Kumsonto contractile yayolulekele ecaleni axis elide esiseleni. Ba ziyatyeba kwaye ezininzi sarcomeres. Oku kwenza ukuba ibe yesibini-order abaqhubi rate. Iiseli zilungiswe ngayo atrioventricular data esiludumbo kunye inyanda bakhe neerhali Purkinje izilayidi kuhlobo lwesithathu iiseli inikezwe.

Kwiiseli ze Uhlobo lwesithathu

Histology ezichongiweyo Iintlobo ezininzi leseli inxalenye yesiphelo yenkqubo Uhanjiso intliziyo. Ngokutsho ukuhlelwa uhlobo yeseli wesithathu ngazo apha kuya kuba nesakhiwo ezifanayo nezo ezibumba imicu Purkinje entliziyweni. Ewe voluminous ngaphezu kwezinye pacemakers, ubude, ububanzi. Ukutyeba kuyahluka myofibrils kuwo onke amacandelo ifayibha, kodwa isixa izinto contractile mkhulu kwi cardiomyocytes eqhelekileyo.

Ngoku singakwazi thelekisa uhlobo lwesithathu neseli abo babumba imicu Purkinje. Histology (kulungiselelwa efunyenwe nezihlunu enkcochoyini kwentliziyo) yezi zinto yahluke kakhulu. Le ongundoqo ngokumila kakhulu buxande, kunye contractile ifayibha iphuhliswe kakhulu buthathaka, kwaye namasebe ezininzi ezihambelanayo. Ukongeza, ukuba abathanga ingqalelo ngokucacileyo ubude iseli yaye zicwangciswe kumathuba elide. organelles imali imbalwa ezithi zilungiswe apha myofibrils.

Umahluko amaza pulses eziveliswa nesantya lokubulawa kwabo, zifuna indlela eziphuhlileyo phylogenetically ungqamaniso ngexesha lenkqubo lokunciphisa zonke iinxalenye intliziyo.

Histological inkqubo umahluko Uhanjiso of cardiomyocytes

Iiseli ze uhlobo yesibini neyesithathu abe imali enkulu glycogen kunye metabolites yayo ngaphezu cardiomyocytes eziqhelekileyo. Olu phawu ilungiselelwe ukunika zeplastiki ngokwaneleyo ukukhusela umsebenzi iseli kunye neemfuno nezondlo. I-enzyme unoxanduva glycolysis kunye glycogen yokuqaphela, kakhulu inxaxheba iiseli inkqubo Uhanjiso ngakumbi. Entliziyweni ukusebenza iiseli baphawula indlela eyahlukileyo. Ngenxa lo msebenzi lula ukunciphisa unikezelo oksijini igqithiselwe pacemakers, kuquka imicu Purkinje. Ukulungiselela inkqubo yokuqhuba emva konyango kwezinto iikhemikhali esebenzayo ukubonisa umsebenzi ophezulu kunye holineserazoy kunye lysosomal enzymes.