Purkinje olona, i loko o ka naʻau

Ko makou naau - he Muscle i loaʻa i ka loa me nāʻano papa hana o ka contraction. Loko o ia mea he luna 'oihana o ka manaʻo aeee (pacemakers), a mea he nunui-ʻilikai hana hoʻoholo nenoaiu. He ka helu o nā manaʻo a me ka Purkinje olona. Ka mea, i ke aupuni 'o ka ventricular myocardium, a he kuleana no lākou synchronous contraction.

General'anatomia o ka vascular'ōnaehana

Cardiac conduction'ōnaehana ua conventionally puunaueia i eha apana ma anatomists. Ka mea mua loa eaaaony ka sinoatrial (sinoatrial) wahi. He he huihui 'ana o ka ekolu laulau o aeee i paha lāʻau ikiʻai wale me ka alapine (frequency) o kanawalu - hoʻokahi haneri a me ka iwakalua manawa no minuke. Kēia mämä holo apono 'i ka naau ana e malama i kūpono koko holo i loko o ke kino, saturation me ka o oxygen, a metabolic kōmi.

Inā no kekahi kumu o ka mua pacemaker hiki kona kuleana pili i ole hana, ka mea lawe i ka atrioventricular (atrioventricular) wahi. Ua Ua Aia ma ka palena o ka naau keʻena i loko o ka waena paku. Kēia lālā o keena o ka alapine ana i loko o ka laulā o kanaono i kanawalu hahau ana, a ua manaoia i ka lua o ka papa pacemaker.

I kekahi kiʻekiʻe o ka conduction nenoaiu - ka mea, o ka pua o kona a me ka Purkinje olona. Ka mea, i ke aupuni 'o ka interventricular septum, a i ka wili i ka apex o ka naau. Kēia i mea e hiki ai e koke puunaue i ka pou impulses o ka ventricular myocardium. hoʻomakaʻia ka mämä holo loli aʻe mai kanaha a kanaono manawa no minuke.

koko lako

Māhele o ka conduction'ōnaehana, a i aia i loko o ka atria, loaa māhuaola mai kekahi mau kumu, kaawale mai ke koena o ka myocardium. Sinoatrial wahi hānaiʻia e kekahi a me na ia liilii arteries mea i loko o ke ao paia o ka naau. Ka makamake nui o ke alo aku o ka artery disproportionately nui i hele ma ka waena wahi. Keia lala o ka akau coronary artery. Ua, ma ka huli, haawi i ka hailona o ka liʻiliʻi lālā i lilo i ke anuanu pukapuka o ka arterial-venous i loko o kēia wahi atrial'aʻaʻa.

Pua o kona a me Purkinje olona, hoi, e mana ia e na lala o ka akau coronary artery (keiki) ole 'ana mai iho. Ma kekahi mau hihia, ke koko e kahe ana i loko o ka 'ole, mai ka circumflex artery. Aia ua no hoi i hana i ka anuanu pukapuka o capillaries i mea paa i ka wili hoʻokahi a cardiomyocytes.

Keena o keʻano mua

Nä mea ma waena o na keena, a he hapa o ka lawelawe oihana, ma muli o ia ka mea i ka mea, i kekahi mau hana. Aia i ekolu papa kuhikuhi ano o ke keena.

Alakai pacemakers e N keena paha keena o keʻano mua. Morphologically, ia mea he uuku Muscle keena me ka nucleus nui, a me ka puu o ka lōʻihi hoi e pana aku, intertwined. Mau kokoke aeee i manaoia me he huhui waina a lākou, hui ma ka hoʻomaopopo like hale ilaloʻili lahilahi.

Hiki paha ke i contraction i loko o ka na meakino P keena hoonohonoho laulau o myofibrils. Mau kumu lilo ai ma ka liʻiliʻi loa o ka hapahā o ka huina makahiki o ka cytoplasm. Other organelles randomly manaʻo i loko o ka halepaahao, a uuku ma mua o ka maʻamau cardiomyocytes. A şarkı cytoskeleton, conversely, e hoonohonoho densely, a malama i ke kinona o ka pacemakers.

Mai kēia mau keena he sino-atrial wahi, akā, 'ē hehee wale, a me ka Purkinje olona, (histology a e e ho'ākāka' ia ma lalo nei) i kaʻokoʻa 'ole.

Ke keena o ka lua o ka type

Ka mea, i kekahi kapa hoʻololi paha latent pacemakers. Irregularly hoʻokino, pōkole ma mua o maʻamau cardiomyocytes, akā, i ka oi aku kona mānoanoa lawa he mau nuclei, a ma ka halepaahao paia i hohonu recesses. Organelles i loko o kēia mau keena ma mua i loko o ka cytoplasm o aeee n.

Ke contractile ka pae loihi ana ia ma ka iho (axis) lōʻihi o ka halepaahao. Lakou mau pūhaka, a i ka hailona o sarcomeres. Ua apono 'ia e ia O Keaukaha o ka lua-mea kōmi. Keena i hoʻonohonoho i kaʻikepili atrioventricular'āina a me ka pua ana o kona a me Purkinje olona,ʻaoʻao ma luna o ke kolu o ka 'ano o ke keena i hōʻike mai iā ia.

Ke keena o ke kolu o ka type

Histology hōʻike 'kekahi mauʻano o aeee i loko o ka maʻi loa o ka cardiac conduction nenoaiu. E like me ka Mea Maluna o ke kolu o ka halepaahaoʻano noʻonoʻo 'aneʻi, e i ka like' ole i ka poe mea e i ka Purkinje olona, i loko o ka naʻau. Ka mea, ua oi voluminous ma mua o nā pacemakers, lōʻihi a me ka laula. Mānoanoa loli aʻe myofibrils ma nā mea a pau puluniu pauku, akā, no ka nui o ka contractile hehee wale, ua oi aku ia mamua i loko o ka maʻamau cardiomyocytes.

Ano, ua hiki ke hoohalike i ke kolu o ka 'ano o ke keena a me ka poe mea e i ka Purkinje olona. Histology (ko lakou hoomakaukau ana i loaa mai, mai nā'aʻaʻa o ka naau apex) o kēia mau kumu mua mea me ka nui loa okoa. Na kāna mau 'ōlelo i ka kūpono kou mau huinahń kinona, a me ka contractile puluniu ulu loa nawaliwali, a i na lala i interconnected. Eia hou kekahi, aole lakou eʻaʻole kālele ana pono ma luna o ka lōʻihi o ka halepaahao, a ua hoonohonoho i lōʻihiʻanuʻu. Scant dala organelles i i ka hooponopono ia a puni na myofibrils.

Oko ao ma ke alapine (frequency) o ka ua loaʻa ka lāʻau ikiʻai a me ka mämä holo o ko lākou hooko, e noi mai ana i ka phylogenetically e hoʻomōhala ana i hoʻononiakahiʻano papa hana ma ke kaʻina hana o ka hoemi nā wahi a pau o ka naau.

Histological oko conduction kahua o nā cardiomyocytes

Ke keena o ka lua a me ke kolu o type i he oi aku ka nui o ka glycogen a me kona metabolites ma mua o maʻamau cardiomyocytes. Kēia hiʻona ua papahana e hōʻike i lawa ea, e uhi i ka halepaahao hana a me ka nutrient koi. ʻO nā'ūhū kuleana no ka glycolysis a me ka glycogen hoʻololi kemikala, ua nui aku kona hana i loko o na keena o ka conduction nenoaiu. Ma ka hana ana i ka naau, i ka mea ku pono kumu keena. Manawa a hiki i kēia hiʻona maʻalahi e emi i ka haawi ana o oxygen hoololiia pacemakers, a me ka Purkinje olona. I ka makaukau ana o ka hoʻokō 'ia''ōnaehana ma hope o lapaʻau o chemically hana waiwai hōʻike kiʻekiʻe hanana hulina me ka holineserazoy a me ka lysosomal nā'ūhū.