Igazi lihamba kanjani emzimbeni wakho wonke? (Ukugeleza Kwegazi kanye Nesistimu Yokujikeleza Kwegazi) Ake sithole ngendlela elula!

Wake wama wazibuza ukuthi le nto ebizwa ngokuthi igazi ihamba kanjani emizimbeni yethu ngaphandle kwezinkinga? Akumangalisi yini? Njalo ngomzuzwana lapho inhliziyo yethu ishaya, le phampu encane ihambisa igazi ohlelweni lwamapayipi emizimbeni yethu. Yilokhu esikubiza ngokuthi ' Uhlelo Lokujikeleza Kwegazi ' . Lawa mapayipi afana namapayipi enjoloba aguquguqukayo athwala igazi liye kuzo zonke izingxenye zomzimba ezincane. Kulungile, ngakho ake sixoxe ngalokhu ngemininingwane ethe xaxa?

Kungani igazi liyigugu kangaka kithi?

Igazi liyingxenye ebalulekile ngempela empilweni yethu. Cabanga nje, yileli gazi elisiza wonke amaseli amancane nezicubu emzimbeni wethu ukuba ziphile futhi zisebenze. Nazi izinto eziyinhloko ezenzeka ngegazi:

• Igazi lithwala umoya-mpilo kanye nezakhamzimba ezibalulekile ezicutshini zomzimba wethu, njengokuletha ukudla neziphuzo emakhaya ethu.
• Igazi lisiza futhi ekususeni i-carbon dioxide engafuneki kanye neminye imfucuza enqwabelana ezicutshini bese iyikhipha emzimbeni, njengokuchitha udoti ekhaya lakho.
• Ngakho-ke ngenxa yakho konke lokhu, igazi libalulekile ekusekeleni izimpilo zethu nasekugcineni zonke izingxenye zomzimba wethu ziphilile .

Uyaqonda ukuthi igazi liyigugu kangakanani?

Kunezinhlobo ezintathu eziyinhloko zemithambo yegazi!

Kunezinhlobo ezintathu eziyinhloko zemithambo yegazi ezisiza ukuhambisa leli gazi emizimbeni yethu. Njengoba nje imigwaqo inemigwaqo emikhulu, imigwaqo emincane, kanye nemigwaqo eseceleni.

1. Imithambo yegazi – imithambo yegazi ethwala igazi elihlanzekile lisuka enhliziyweni

Imithambo yegazi iyimithambo yegazi ethwala igazi elinomoya-mpilo omningi (ngokuvamile eboniswa ngombala obomvu kumadayagramu) kanye nezakhamzimba ezivela enhliziyweni yethu ziye kuzo zonke ezinye izicubu emzimbeni. Cabanga ngakho njengokuthi inhliziyo iyiphampu yamanzi, kanti imithambo yegazi ifana namapayipi amakhulu athwala amanzi ahlanzekile avela kuleyo phampu aye engadini yonke.

• Lolu hlelo lwemithambo yegazi luqala nge-aorta, umthambo wegazi omkhulu kunayo yonke ophuma enhliziyweni. Lufana nepayipi elikhulu kunawo wonke eliphuma ethangini lamanzi eliyinhloko.
• Lezi zithwala igazi elinomoya-mpilo elivela enhliziyweni liye kuzo zonke izicubu zomzimba.
• Njengoba usuka enhliziyweni, le mithambo ihlukana ibe amagatsha, kancane kancane iba mincane. Njengomfula omkhulu uhlukana ube yimifudlana emincane.

Ngakho-ke, umsebenzi oyinhloko wemithambo yegazi ukusabalalisa igazi elihle emzimbeni wonke .

2. Ama-Capillaries – izikhungo zokushintshanisa ezincane kakhulu

Ama-capillary ayinethiwekhi yemithambo yegazi emincane kakhulu, emincane kakhulu. Yilokhu okuhlanganisa imithambo yegazi emibili emikhulu, imithambo yegazi kanye nemithambo yegazi. Cabanga ngawo njengochungechunge lwemigwaqo emincane eseceleni phakathi kwemigwaqo emibili emikhulu.

• Izindonga zalezi zinhlayiya zincane kakhulu, njenge-mesh.
• Lezi zindonga ezincane zivumela izinto ezinhle ezifana nomoya-mpilo nezakhamzimba ukuthi zidlule zisuka egazini ziye emangqamuzaneni ezicubu, kanye nezinto ezingafuneki njenge-carbon dioxide kanye nemikhiqizo engcolile ekhiqizwa emangqamuzaneni ezicubu ukuthi zibuyele egazini . Kufana nokushintshana ngezimpahla emakethe.

Eqinisweni, lokhu kushintshana okubalulekile ezingeni lamaseli omzimba kwenzeka ngalezi zinhlayiya ezincane. Zincane kakhulu, ezinye zazo zincane kunezinwele zethu! Kodwa umsebenzi eziwenzayo mkhulu kakhulu, akunjalo?

3. Imithambo yegazi – imithambo yegazi ethwala igazi elingcolile ilibuyisele enhliziyweni

Imithambo yegazi ithwala igazi eliphelelwe umoya-mpilo, noma "elingcolile" (ngokuvamile eliboniswa ngombala oluhlaza okwesibhakabhaka kumadayagramu) lisuka ezicutshini zomzimba wethu libuyele enhliziyweni. Lifana nohlelo lwamapayipi aqoqa amanzi asetshenzisiwe bese ewabuyisela ethangini.

• LokhuImithambo yegazi ithwala igazi elinomoya-mpilo ophansi kanye ne-carbon dioxide ephezulu isuka ezicutshini zomzimba iyibuyisele enhliziyweni.
• Njengoba le mithambo isondela enhliziyweni, iyahlangana futhi iba mikhulu. Njengemifudlana emincane ihlangana ukuze yakhe umfula omkhulu.
• Ekugcineni, umthambo omkhulu obizwa ngokuthi i-'superior vena cava' uletha igazi elivela ekhanda nasezingalweni liye enhliziyweni. Ngokufanayo, umthambo omkhulu obizwa ngokuthi i-'inferior vena cava' uletha igazi elivela esiswini nasemilenzeni liye enhliziyweni.

Ngakho-ke umsebenzi oyinhloko wemithambo yegazi ukubuyisa igazi eliqukethe imfucuza eqongelela emzimbeni enhliziyweni bese liyiqondisa ekuhlanzweni .

Lolu hlelo lwemithambo yegazi lukhulu kangakanani kunalokho ocabanga?

Manje usungabona ukuthi uhlelo lwemithambo yegazi, imithambo yegazi, kanye nama-capillary luyinkimbinkimbi kangakanani emizimbeni yethu. Ubuwazi ukuthi lonke uhlelo lwemithambo yegazi - okungukuthi, yonke imithambo yegazi, imithambo yegazi, kanye nama-capillary kuhlangene - lungaphezu kwamamayela angu-60,000 ubude ! Igazi lethu ligeleza kulesi simiso esikhulu njalo. Kufana nenethiwekhi yemigwaqo edolobheni, enezimoto ezihamba njalo. Ngakho-ke lowo osiza ekupompeni lonke leli gazi emzimbeni yinhliziyo yethu. Nguyena oqondisa yonke le nqubo.