Ihlelo lokukhambisa iingazi

Uhlelo kwanoma iyiphi umzimba isilwane siqukethe izitho iqembu kwegazi, kuhileleke nezinye izinkinga okuyinto kwegazi igazi. Ngenxa yalokho wokusebenza salo esivamile idluliswe isilinganiso esifanele umoya-mpilo nezakhi hormone nosawoti kanye nezinye izakhi ezibalulekile. Ngaphezu kwalokho, uhlelo kwegazi eyenza umsebenzi wesibili. Kuthatha amaseli nokusaphaza exchange kuthatha kuzo zonke izingxenye zomzimba kwakhiwa therein-carbon dioxide. Inethiwekhi eyinkimbinkimbi owakheka kunesidingo ukuze kusebenze zezinto eziphilayo zilethwa zonke kwesistimu yayo, kwakhiwa kusukela ezitsheni, inhliziyo negazi uqobo.

ukusebenza System, ekuletheni kuzo zonke izinhlaka umsoco, esekelwe umsebenzi kwemisipha esivimba amanzi. Okungukuthi, ekwenzeni umsebenzi futha, uzotshala igazi ngesivinini. Inani lale ubuningi ilingana amamitha nanye ngomzuzwana. Lapho Kufinyeta of imisipha yenhliziyo e ingcindezi uketshezi kwenzeka, kuthiwa ngokweqile. Kuyinto ngenhla ozungeze umhlaba wethu. ukucindezeleka okweqile zokwelapha ibizwa ngokuthi igazi. nesilinganiso yayo iqala iqoqo zero bayalingana ezidlula kuya umfutho womoya. Phakathi ngomzuzu omunye umsebenzi wenzeke ngesikhathi isimo quiescent yomzimba, inhliziyo iphampa ngokusebenzisa uqobo kakhulu 3.6 amalitha igazi elithile ukuze silondoloze voltage yangaphakathi kukhiqizwa. Umfutho wegazi uthatha inani layo esiphezulu ngesikhathi ikhodi kuveza ukwehla (systole). Lapho ukuphumula esivimba amanzi (diastole), lo voltage yangaphakathi lehla zero.

Ihlelo lokukhambisa iingazi kwenethiwekhi yayo edlulisa ukugeleza kwegazi. Udabula imithambo, ethula uketshezi kokuba kwabantu 1.06 amagremu ngamunye isentimitha cubic. Igazi ukugeleza ihamba ngokusebenzisa irherho, kufaka ekhipha igazi enhliziyweni nelifakayo ezinkulu. legatsha lezizitsha ngokuphindaphindiwe futhi kancane kancane wehlise ngosayizi ukuba capillary kulencane. Ukugeleza kwegazi ihamba ngesivinini okuyinto eyayibekwa isigqi inhliziyo. On ukunyakaza ketshezi futhi inomthelela ukungezwani zangaphakathi kanye inesikhala ubukhulu bomkhumbi. Imithambo zidlulela ukusakaza igazi ngamasentimitha amahlanu ngomzuzwana. Ngo ngemithambo ukubaluleka kwalo amabili cm / s. Capillary kukhona ijubane ongaphakeme kakhulu ngenxa ubukhulu labo elincane. Kuyinto amamilimitha angu esingaphansi kwezinsuku ezimbili ngomzuzwana. Uma lokhu ingcindezi pulses kuthiwa ukuyiveza e-capillary.

Umthamo isimiso sokujikeleza kwegazi kuningi kunokomuntu lemali egazini emzimbeni. Ligcwele eziyinkulungwane amane kuphela. Kulesi kunesizathu. Uma kuphakama izimo ezidinga ngaphezulu igazi ligeleze ezithweni, kuyoba ukuhambisa endaweni efanele.

Anatomy of the inhliziyo izitsha igazi njalo Ply ivumela igazi unxantathu, okubandakanya emaphashini, imisipha, myocardium futhi isibindi. Kulokhu, lo ezidingekayo izakhi edabula ekhipha igazi liphuma kuma-capillary, nokuthola kuwo wonke amangqamuzana zomzimba womuntu, emisebenzini evamile komzimba. Lapho ukwakha imisipha zenhliziyo semithambo imihlola sokugembula zenzeka izifo kwegazi. Lezi zifo zihlanganisa:

- acute rheumatism imfiva uhlobo;

- isifo ischemic of imisipha yenhliziyo;

- izifo okuyinto ahambisana ukwanda umfutho wegazi;

- rheumatism isifo senhliziyo;

- kokunikezwa kwe-isimiso sokujikeleza kwegazi emaphashini;

- isifo cerebrovascular;

- isifo se-capillary nokuvaleka kwemithambo;

- izifo emithanjeni, imigudu ye-lymph kanye ISIZINDA;

- nezinye izitsha kanye nesifo senhliziyo.

Ihlelo lokukhambisa iingazi, kanye empilweni yakhe ngeso lokhozi yesayensi yezokwelapha. Isizathu salokhu kukhona okungekuhle idatha izibalo ukuthi ukubeka isifo senhliziyo semithambo kwasekuqaleni emhlabeni ngokuya yangenyama.