I letindzala kwegazi - i bobuchule

Ungazibona yini ngeso lengqondo indlu lapho kuthiwa more xaka piping uhlelo egcwele uketshezi oluyigugu kakhulu ngokushelela ahambisa amanzi, ukudla, umoya-mpilo futhi kususa kusaphaza okungaka? Ngaphezu kwalokho, amapayipi ngokwabo bayakwazi ngokwabo sokusukuma futhi ikhule, ukujwayeza yezinguquko endlini. Lesi sakhiwo ubunjiniyela engakwenza ukutuswa wonke umuntu.

Kodwa yethu isimiso sokujikeleza kwegazi uyakwazi ngaphezulu. It alawule nezinga lokushisa komzimba, ukuhambisa lenqwaba hormone ezahlukene ukuthi zinokwaziswa ezibalulekile wonke amaseli, ahlele ukuvikelwa emagciwaneni. Lokhu inethiwekhi nezimo ngokuphelele kanye ezithambile, ngakho-ke uyakwazi ukuqonda yonke uthuthumele futhi nokuvumelana emzimbeni. Ake sibheke le wobuciko eduze.

Isakhiwo lesi simiso sabantu kwegazi

Maphakathi isimiso sokujikeleza kwegazi umzimba eziyize - inhliziyo, okuyinto efana futha ngokuqhubekayo iphampa igazi ku-loop avaliwe, ehlanganisa imithambo.

Lonke uhlelo sehlukaniswe tincenye letimbili:

• yokujikeleza kwegazi eliya emaphashini. Isimiso semithambo yegazi ngokuxhumanisa ndawonye inhliziyo namaphaphu. Ucala emjikelezweni e-ventricle yangakwesokudla, ekupheleni itholakala ATRIUM ngakwesokunxele. Sisebenza emaphashini.

• A isiyingi esikhulu kwegazi. It zivela e-aorta futhi iphela ATRIUM kwesokudla.

Elikhulu kwegazi ngoba izinto zalo njengoba okukuwo wonke umzimba.

Inhliziyo ngosizo izindonga longitudinal ihlukaniswe yaba izingxenye ezimbili. Ngayinye yalezi izingxenye nalo ihlukaniswe halves ezimbili esebenzisa ngodonga ovundlile, ukwakha i-ventricle futhi ATRIUM.

Igazi lokuqala ingena isitsha eyinhloko umzimba - elikuyi-aorta. Ngaphezu kwalokho aorta sehlukaniswe emiphongolweni emincane, negazi engena Umthambo ka kwegazi. Kancane kancane imithambo azikhandle off badlulele arteriole futhi capillary. I ububanzi we-capillary sincane kakhulu - cishe 10 microns. Lokhu kusho ukuthi amangqamuzana abomvu egazi, ithwala oxygen ukuze kudlule amangqamuzana ngokusebenzisa capillary ngesikhathi. Izindonga izitsha capillary mancane kakhulu - aqukethe kuphela isendlalelo esisodwa amaseli, kodwa akuvimbeli supply izakhi ezicutshini etholakala ingxenye ewuketshezi yegazi (uketshezi olungenambala olusegazini). Kanyekanye kwezicubu ku-capillary ngocansi carbon dioxide futhi umzimba imikhiqizo ezidinga ukususwa emzimbeni.

Capillary abe imisipha kancane loopy, ngayo nefunda ngayo bangakwazi ukulawula enomopho edabula kubo, ukuze kuhlangatshezwane nezidingo kwezicubu ezizungezile. Lapho igazi liphuma kuma-capillary, lingena emithanjeni emincane - ama-venule. Ama-venule okwengeziwe coalesce ku imithambo yegazi kubo iyachubeka ukuze kwegazi, kubuyela inhliziyo. Ngo ngemithambo umfutho wegazi usuke ngaphansana imithambo, kodwa lumens emithanjeni ngaphezulu.

Kanjani inhlangano yawo okuphambene kuqinisekiswa?

Ngenxa lithathelwe brilliant:

• I-valve inkomishi emise ukuthi luvimbele igazi sasivela inhliziyo bedle adonsela phansi.

• Umsebenzi we imisipha yohlaka, okuyinto cindezela ngemithambo eduze zishiyane, ukusunduza igazi ngokusebenzisa lendlela eyodwa valve bebheke inhliziyo.

• ingcindezi Yangaphakathi esifubeni esiswini ngesikhathi ukuphefumula futhi luyehluka kusiza ngemithambo ukumpompa igazi phakathi ATRIUM kwesokudla.

Lapho-valve emithambo yegazi ngoba noma ngabe yisiphi isizathu (sokukhulelwa, lezinceku yofuzo, ukukhuluphala noma ibanga elide) azisebenzi kahle, igazi anqwabelene emithanjeni zigcwala ngaphansi valve. Lesi simo njengoba varicose emithanjeni ezaziwayo.

Kwegazi ihambisa i-oksijini kanye nobuchopho amaseli. Ngakho-ke, isimiso sokujikeleza kwegazi ebuchosheni igazi Kwenziwa yimithetho efanayo zonke ezinye izitho. Uma outflow emithambo yegazi izitsha ubuchopho kunzima, khona-ke kukhona isiyezi kanye nekhanda.

Kwenzeka isimanga, lesi nekusebenta kweluhlelo womuntu kwegazi uphakeme kakhulu kangangokuthi ngisho uphumule ngeminithi elilodwa, mayelana 5 amalitha igazi sidlula inhliziyo futhi webanga engaba ngu-35 amalitha njalo ngomzuzu.

Njengoba ubona uMdali wethu umklami ngempela okukhulu, ogama icala isandla - kwegazi - kuyinto ngimthande!