Imibuzo Eyisibonelo Exoxa Ngendima Yesistimu Yokujikeleza Kwegazi Ekuthuthweni Nasekushintshisaneni Kwezinto
Uhlelo lokujikeleza kwegazi ludlala indima ebalulekile empilweni yezinto eziphilayo eziyinkimbinkimbi, ikakhulukazi abantu nezinye izilwane. Lusebenza njengendlela eyinhloko yokuthuthwa kwezakhamzimba, amagesi, ama-hormone, kanye nemikhiqizo engcolile emzimbeni wonke. Ukuqonda uhlelo lokujikeleza kwegazi kubalulekile hhayi nje kuphela ngokombono wezinto eziphilayo kodwa futhi nasekusetshenzisweni kwezokwelapha kanye nezempilo. Lesi sihloko sizohlola lesi sihloko ngezibonelo eziningana zezinkinga ezibonisa indima ebalulekile yohlelo lokujikeleza kwegazi.
Umbuzo 1: Chaza ukuthi uhlelo lokujikeleza kwegazi lulawula kanjani ukuthuthwa komoya-mpilo emzimbeni!
Ingxoxo:
Uhlelo lokujikeleza kwegazi, oluhlanganisa inhliziyo, imithambo yegazi, kanye negazi, lunesibopho sokusabalalisa umoya-mpilo ovela emaphashini uye kuwo wonke amaseli emzimbeni. Le nqubo iqala emaphashini, lapho umoya-mpilo uphefumulwa khona bese ungena e-alveoli. Lapha, umoya-mpilo uyasakazeka kulo lonke ulwelwesi lwe-alveolar bese ungena emithanjeni yamaphaphu. Umoya-mpilo ube usubopha i-hemoglobin emangqamuzaneni abomvu egazi bese uthwalwa ngemithambo yamaphaphu uye ohlangothini lwesobunxele lwenhliziyo.
Inhliziyo ibe isipompa leli gazi elinomoya-mpilo nge-aorta kanye nomzimba wonke. Ngemva kokuba amangqamuzana omzimba esebenzisa umoya-mpilo ukuze kugaywe kahle, igazi elingenawo umoya-mpilo libuyela enhliziyweni nge-vena cavae ephezulu nengaphansi, lapho liphonswa khona emaphashini ukuze kususwe i-carbon dioxide futhi kuthathwe umoya-mpilo omusha. Lo mjikelezo uyaqhubeka njalo, uqinisekisa ukutholakala komoya-mpilo owanele ukusekela ukusebenza kweseli kanye nezitho zomzimba.
Umbuzo 2: Uhlelo Lokujikeleza Kwegazi Luhileleke Kanjani Ekuthuthweni Kwezakhamzimba kanye Nemfucuza Ye-Metabolic?
Ingxoxo:
Izakhamzimba ezithathwa ekudleni, njenge-glucose, ama-amino acid, ama-fatty acid, amavithamini, kanye namaminerali, zimuncwa ngodonga lwamathumbu bese zingena ohlelweni lokujikeleza kwegazi. Uhlelo lokujikeleza kwegazi lusabalalisa lezi zakhamzimba kuwo wonke umzimba, ezithweni nasezicutshini ezidingekayo ukuze kukhule, kulungiswe, futhi kukhiqizwe amandla.
Uma amangqamuzana esebenzisa izakhamzimba nomoya-mpilo, akhiqiza imikhiqizo ebangela ukwakheka kwegazi okumele isuswe ngokushesha ukuze kuvinjelwe amazinga anobuthi. Uhlelo lokujikeleza kwegazi luthwala imfucuza efana ne-carbon dioxide ne-urea kusuka emaselini iye ezithweni zokukhipha ukungcola. I-carbon dioxide ithwalwa iye emaphashini ukuze ikhishwe ngokuphefumula, kuyilapho i-urea ithwalwa iye ezinso ukuze ikhishwe emchameni.
Umbuzo 3: Xoxani Ngendima Yohlelo Lokujikeleza Kwegazi Ekulawuleni Ukushisa Komzimba!
Ingxoxo:
Uhlelo lokujikeleza kwegazi ludlala indima ebalulekile ekulawuleni izinga lokushisa lomzimba, noma ukuguquguquka kwesimo somzimba. Lapho izinga lokushisa lomzimba likhuphuka, imithambo yegazi eduze kobuso besikhumba iyavuleka, inqubo eyaziwa ngokuthi i-vasodilation. Lokhu kuvumela igazi eliningi ukuthi ligeleze eduze kobuso besikhumba futhi kwandisa ukulahlekelwa ukushisa endaweni ezungezile, kupholise umzimba.
Ngakolunye uhlangothi, uma izinga lokushisa elizungezile libanda, imithambo yegazi iyancipha, noma i-vasoconstrict, okunciphisa ukugeleza kwegazi esikhumbeni futhi kulondolozwe ukushisa komzimba. Ngaphezu kwalokho, ukugeleza kwegazi kuya nokubuya ezithweni zangaphakathi njengobuchopho nesibindi kungalawulwa ukuqinisekisa amazinga okushisa afanele okusabela kwamakhemikhali.
Umbuzo 4: Ukuhlaziywa Komthelela Wezinkinga Zesistimu Yokujikeleza Kwegazi Empilweni
Ingxoxo:
Ukuphazamiseka kohlelo lokujikeleza kwegazi kungaholela ezinkingeni eziningi zempilo ezinkulu. I-atherosclerosis, isibonelo, yisimo lapho i-plaque inqwabelana khona ezindongeni zemithambo yegazi, inciphise futhi inciphise ukugeleza kwegazi. Lokhu kungaholela ekucindezelekeni kwegazi (umfutho wegazi ophakeme), ukuhlaselwa yinhliziyo, noma isifo sohlangothi.
Ngaphezu kwalokho, ukwehluleka kwenhliziyo, lapho inhliziyo ingakwazi ukupompa igazi ngempumelelo, kuholela ekunciphiseni kokunikezwa komoya-mpilo nezakhamzimba ezicutshini, okungaholela ekukhathaleni, ekuvuvukeni nasekuphelelweni komoya. Izinkinga zokujikeleza kwegazi ezifana ne-anemia, ebonakala ngokubalwa kwamangqamuzana abomvu egazi noma i-hemoglobin ephansi, nazo zinciphisa ukunikezwa komoya-mpilo, okuholela ezimpawini ezifana nokukhathala, isiyezi kanye nokukhanya.
Umbuzo 5: Incazelo Yokuxhumana Phakathi Kohlelo Lokujikeleza Kwegazi Nezinye Izinhlelo Emzimbeni
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Uhlelo lokujikeleza kwegazi lusebenza ngokubambisana nezinye izinhlelo zomzimba ukuze kugcinwe i-homeostasis. Isibonelo esiyinhloko ukusebenzisana phakathi kwezinhlelo zokujikeleza kwegazi kanye nezokuphefumula. Njengoba kushiwo ngaphambili, uhlelo lokujikeleza kwegazi luthwala i-carbon dioxide emaphashini ukuze ikhishwe.
Uhlelo lokujikeleza kwegazi luphinde lusebenzisane nohlelo lokugaya ukudla ukuze lusabalalise izakhamzimba futhi lusebenza nohlelo lwe-endocrine ukuze luthuthe ama-hormone avela ezindlaleni aye ezithweni zomzimba eziqondiwe. Uhlelo lokujikeleza kwegazi lubalulekile futhi ohlelweni lokuzivikela komzimba; amangqamuzana amhlophe egazi ajikeleza emithanjeni yegazi ukuze afune futhi abhubhise amagciwane angena emzimbeni.
Umbuzo 6: Uhlelo Lokujikeleza Kwegazi Luzivumelanisa Kanjani Nezidingo Ezihlukene Zomzimba?
Ingxoxo:
Umzimba womuntu kanye nezinye izilwane eziningi zibonisa ukuzivumelanisa okuningana ohlelweni lokujikeleza kwegazi ukuze zisabele ezidingweni ezahlukene zomzimba. Uma umuntu ezivocavoca, isibonelo, isidingo somoya-mpilo kanye nokususwa kwe-carbon dioxide kuyanda. Inhliziyo isabela ngokwandisa imvamisa namandla okufinyela, ngaleyo ndlela ikhulisa ukugeleza kwegazi emisipheni esebenzayo.
Ezinye izindlela zokuzivumelanisa nezimo zifaka phakathi ukwanda kwenani lamaseli abomvu egazi kubantu abahlala ezindaweni eziphakeme, lapho ukucindezeleka komoya-mpilo kuphansi khona. Lokhu kuhlose ukwandisa amandla okuthwala umoya-mpilo egazini, ngaleyo ndlela kuqinisekiswe ukutholakala komoya-mpilo okwanele kwezicubu zomzimba naphezu kokugcwala komoya-mpilo okuphansi emoyeni.
Isiphetho
Uhlelo lokujikeleza kwegazi lubalulekile ekulawuleni nasekuhambiseni ukuthuthwa nokushintshaniswa kwezinto emzimbeni wonke. Ukuthuthwa kahle komoya-mpilo, izakhamzimba, kanye nokungcola kwe-metabolic kubalulekile ekukhuleni okuhle kanye nokusebenza komzimba. Ukuqonda indima yohlelo lokujikeleza kwegazi kubalulekile kochwepheshe bezempilo ukuze baklame izindlela zokungenelela ezifanele kubantu abanezinkinga zenhliziyo nemithambo yegazi. Ngakho-ke, ukufunda ngohlelo lokujikeleza kwegazi akusizi nje kuphela emfundweni yezemfundo kodwa futhi kunemiphumela ewusizo ekugcineni impilo enhle.
