Shell zuciya. A tsarin da mutum zuciya

Zuciya - babban jinin samar da sashin jiki tsarin da Lymph samuwar a cikin jiki. Yana da aka gabatar a cikin wani nau'i na manyan tsoka da dama m bẽnãye. Saboda su ikon yi mu'ãmalar, sakamakon da motsi na jini. Gaba daya akwai uku harsashi zuciya: wa epicardium, endocardium da myocardium. A tsarin, manufa da kuma aiki kowane daga cikinsu la'akari a cikin wannan abu.

A tsarin da mutum zuciya - haltta

Cardiac tsoka kunshi 4 bẽnãye - 2 atria da ventricles 2. A hagu ventricle kuma bar atrium kafa da ake kira jijiya ɓangare na zuciya da sauransu, dangane da yanayin da jini located a nan. A akasin wannan, da dama ventricle da dama atrium dokoki da venous gefe na zuciya.

Jini jiki ne wakilta a cikin wani nau'i na flattened mazugi. Yana da aka ware tushe, kai, da kuma kasa daga cikin agara surface, da kuma biyu gefen - hagu da kuma dama. A saman zuciya yana da wani taso siffar da aka integrally kafa ta hagu ventricle. A tushe yankin located atrium, kuma ta gaban rabo ya ta'allaka lakã da na huhu akwati.

size na zuciya

An yi imani da cewa da ya fara tasawa, kafa wani mutum mutum girma daga cikin zuciya tsoka daidai size of a clenched dunkulallen hannu. A gaskiya, da talakawan jiki tsawon balagagge mutum ne 12-13 cm. A diamita 9-11 cm daidai yake da zuciya.

adult namiji zuciya taro - game da 300 mata suna da zuciya weighs wani talakawan na game da 220 grams

Phase na zuciya

Da dama jinsin raba bulan zuciya tsoka:

1. A farkon akwai wani rage daga cikin atria. Sa'an nan kuma, tare da wasu deceleration farawa ƙanƙancewa na ventricles. A lokacin da wannan tsari da jini ya kwarara da sauƙi o ƙarin cika masallaci tare da rage matsin lamba. To, don me ba da baya da ya kwarara a cikin atrium? Gaskiyar cewa jini waylaid ciki bawuloli. Saboda haka, yana iya kawai motsa a cikin shugabanci na lakã da na huhu tasoshin.
2. Na biyu lokaci - shakatawa na ventricles da atria. A tsari ne halin da gajere karu a tsoka sautin gininsu daga abin da waɗannan bẽnãye suna kafa. A tsari sa wani karu a matsa lamba a cikin ventricles. Saboda haka, jini ya fara motsa a gaban shugabanci. Duk da haka, wannan ne ya hana ta rufe da na huhu da kuma aortic bawul. A lokacin shakatawa na ventricles cika da jini, wanda ya zo daga atria. A akasin wannan, da atria suna cike da jiki ruwa na babban kuma karamin da'irar jini wurare dabam dabam.

Abin da yake da alhakin aiki na zuciya?

Kamar yadda aka sani, aiki na zuciya tsoka ba wani sabani yi. Jiki ya kasance mai aiki ci gaba, koda lokacin da mutum ne a cikin wani Jihar barci. Abu ne mai wuya akwai mutanen da suke kula da ka zuciya rate a lokacin aiki. Amma wannan da aka cimma ta musamman tsarin, saka a cikin zuciya tsoka kanta - biologic bugun jini sa tsarin. Abin lura shi ne cewa samuwar ce inji har yanzu auku a cikin ta farko makonni na intrauterine fetal asalin. Daga bisani, bugun jini sa tsarin ba da damar da zuciya zuwa dakatar a dukan rayuwarsa.

Ban sha'awa abubuwa game da aikin na zuciya

A cikin quiescent jihar da yawan contractions daga cikin zuciya tsoka a lokacin minti daya ne game da 70 lashe. A cikin sa'a daya da lambar kai 4200 punches. Ganin cewa a lokacin daya zuciya ƙanƙancewa ejects a cikin jijiyoyi na 70 ml na ruwa, shi ne mai sauki tsammani cewa an hour wuce ta wurin shi zuwa 300 lita na jini. Nawa wannan jiki farashinsa jini a rayuwa? Wannan adadi ne matsakaita na 175 da miliyan lita. Ba abin mamaki ba cewa zuciya ne da ake kira manufa engine, wanda kusan ba ya kasa.

rufi na zuciya

Total ya zama ruwan dare 3 raba harsashi cardiac tsoka:

1. Endocardium - ciki membrane na zuciya.
2. Myocardium - ciki tsoka hadaddun kafa m filamentary zaruruwa.
3. Epicardium - da bakin ciki matsanancin harsashi na zuciya.
4. Pericardium - karin cardiac daina kai hare hare da cewa shi ne wani nau'i ne na wata jakar, wanda ya ƙunshi dukan zuciya.

Next, bari mu magana game da sama Layer na zuciya domin, dubi su ilmin jikin mutum.

myocardium

Myocardium - mnogotkanevaya murdede Layer na zuciya, wanda aka kafa striated zaruruwa sako-sako da connective Tsarin, na tsarin jijiya matakai, kazalika da wani Babbar cibiyar sadarwar capillaries. A nan ne P-Kwayoyin cewa samar jijiyar da za'ayi. Bugu da kari, akwai Kwayoyin a cikin myocardium myocytes da cardiomyocytes, wanda ke da alhakin rage jini jiki.

A myocardium aka hada da dama yadudduka: ciki, na tsakiya da kuma m. A ciki tsarin da aka hada da tsoka daure cewa ana shirya longitudinally game da juna. A m Layer na tsoka daure aka shirya à. Recent mika zuwa sosai koli na zuciya, wanda ya samar da wani da ake kira curl. A tsakiyar Layer kunshi wani madauwari tsoka daure, raba ga kowane daga cikin ventricles na zuciya.

epicardium

Gabatar harsashi na zuciya tsoka ne sosai santsi, bakin ciki da kuma da ɗan m tsarin. Epicardium siffofin da m jiki nama. A gaskiya, da harsashi abubuwa a matsayin wani ciki Layer na pericardium - abin da ake kira zuciya daga cikin jakar.

Epicardial surface kafa na mesothelial Kwayoyin, wanda aka located a karkashin hada guda biyu, sako-sako da tsarin wakilci a haɗa zaruruwa. A koli na zuciya da kuma a cikin furrows, dauke da harsashi ya hada da kitse nama. Epicardium Yanã shigar da myocardium a wuraren kalla taru na kitse Kwayoyin.

endocardium

Ci gaba da membrane na zuciya, bari mu magana game da endocardium. The gabatar tsarin da aka kafa na roba zaruruwa cewa an hada da m tsoka Kwayoyin da connective. Endocardial nama rufi duk ciki ɗakunan ajiya na zuciya. A mikawa daga sashin jiki jini abubuwa: lakã, na huhu jijiya, na huhu akwati endocardial nama fitowa smoothly ba tare da jinsin iyakoki. A mafi m sassa na atrial endocardium Fused da epicardium.

pericardium

Pericardium - matsanancin mucous membrane na zuciya, kuma aka sani da pericardium. Wannan tsarin da aka gabatar a cikin wani nau'i na truncated mazugi kaikaice. Lower tushe pericardium aka sanya a kan diaphragm. Don saman harsashi ke kan zuwa gefen hagu fiye da dama. Wannan irin jakar ba kawai na kewaye da zuciya tsoka, amma kuma da lakã, bakin huhu akwati da m jijiyoyinmu.

A pericardium an kafa daga mutum mutane a farkon matakai na fetal ci gaba. Wannan na faruwa game da 3-4 makonni bayan samuwar amfrayo. Lalacewar da tsarin da harsashi, ta m ko cikakken rashi sau da yawa take kaiwa zuwa nakasar zuciya cuta.

a ƙarshe

A cikin biyayya da aka dauke shi da tsarin da mutum zuciya, ilimin halittàr jiki da ya bẽnãye da membranes. Kamar yadda ka gani, zuciya tsoka yana da fasali mai rikitarwa. Abin mamaki, duk da m tsarin, wannan jiki aiki ci gaba cikin rayuwa, bada gazawar kawai a yanayin saukan tsanani pathologies.