Isithombe: Umdwebo wesistimu yenhliziyo

Isithombe sibonisa ukumelwa okuhleliwe okucwengisiswe nokuklanywe ngokucophelela kwesistimu yenhliziyo yomuntu, eyenziwe yaphila ngenhlanganisela yokunemba kobuchwepheshe nokucaca kobuciko. Enkabeni yale nhlanganisela kukhona inhliziyo, enemibala ecebile ebomvu egcizelela kokubili ukuma kwayo kwemisipha kanye nendima yayo njengephampu elibalulekile lokuphila. Amakamelo aso nemithambo engaphezulu kuchazwe ngokucophelela, kwembule imithambo yenhliziyo ehambisa igazi eligcwele umoya-mpilo emisipha yenhliziyo ngokwayo, okugqamisa indima embaxambili yesitho somzimba njengokubili injini yokujikeleza kanye nesakhiwo esithembele ekunikezeni igazi laso. I-aorta iphakama ngokugqamile ukusuka phezulu kwenhliziyo, ijikela phezulu ngaphambi kokuba ihlanganise emithanjeni ephephezela ngaphandle, ngokushesha isungula umuzwa wamandla nesiqondiso ekugelezeni kokujikeleza kwegazi.

Inethiwekhi yemithambo iphumela ngaphandle isuka enhliziyweni emaphakathi, isistimu yamagatsha emithanjeni nemithambo enwebeka ngokufana okufana nesihlahla ngaphesheya kwengemuva elimnyama. Umkhumbi ngamunye ucwebile futhi ucaciswe ngokucacile, imithambo ikhazimula ngombala obomvu ogqamile kuyilapho imithambo ithatha umthunzi othobile, ogcizelela iluphu eqhubekayo yegazi eline-oxygen kanye ne-deoxygenated. I-branching design ayibonisi nje inkimbinkimbi yokujikeleza kwegazi kodwa futhi idlulisela ukuhleleka nokusebenza kahle, njengoba yonke indlela iyingxenye yesistimu ebanzi eklanyelwe ukuletha umoya-mpilo osekela ukuphila kanye nezakhamzimba ngisho nasezicutshini ezikude kakhulu zomzimba. Ukubukwa kwamehlo ngesikhathi esifanayo kuyafundisa futhi kuyalinganisela ngobuhle, kanti imikhumbi emikhulu esekela ukwakheka kanye namagatsha amancane ahlinzeka ngemininingwane eyinkimbinkimbi ngaphandle kokweqa isibukeli.

Ukukhanyisa kudlala indima ebalulekile ekwakheni umuzwa wobukhulu. Ukukhanya okuthambile, okuqondisayo kugqamisa ukugoba kwenhliziyo kanye nesimo esiyisilinda semithambo, kuveza izithunzi ezicashile ezinikeza izakhiwo isisindo nokuba ngokoqobo. Lokhu kukhanyisa kuphinde kuqondise iso ngokwemvelo, kugcizelela izingxenye ezibalulekile njenge-aorta ekhuphukayo, imithambo yamaphaphu, nemithambo yenhliziyo, iqinisekisa ukuthi ukugxila kombukeli kuhambisana nokubaluleka kwe-anatomical kwesakhiwo ngasinye. Ngokumelene nesimo sangemuva esimnyama, esingathathi hlangothi, okubomvu okucacile kwesimiso senhliziyo nemithambo yegazi kubonakala kukhanya, kuqinisa ubungqabavu baso nokuba maphakathi kwempilo yomuntu.

Ubuhle bubonke bungokomtholampilo kodwa bunamandla, bunqamula umugqa phakathi komdwebo wencwadi yokufunda kanye nokunikezwa kwezokwelapha okunezinhlangothi ezintathu. Ingemuva elihlanzekile kanye nephalethi engathathi hlangothi yegrey kanye nabamnyama isusa iziphazamiso, iqinisekisa ukuthi konke ukunakwa kuqondiswe ohlelweni lwenhliziyo nemithambo yegazi uqobo. Imidwebo yomugqa ecashile ngemuva iphakamisa izimo zobuchwepheshe noma zesayensi, okuqinisa nakakhulu umbono walesi sithombe njengokubili insiza yezemfundo kanye nophawu lokuqonda okuthuthukisiwe kwe-biomedical.

Ngaphandle kokunemba kwaso okubukwayo, isithombe sidlulisa ukulandisa okujulile mayelana nendima ebalulekile yohlelo lwenhliziyo nemithambo yegazi ekugcineni impilo. Inhliziyo, njengengxenye eyinhloko, ihlanganisa ukukhuthazela nesigqi, idonsa igazi ngokungakhathali ochungechungeni olukhulu lwemithambo yomzimba. Imithambo ehlanganisa amagatsha nemithambo isebenza njengesingathekiso esibukwayo sokuxhumana nokuncikana, okusikhumbuza ukuthi wonke amangqamuzana asemzimbeni asekelwa yile webhu yokujikeleza eyinkimbinkimbi. Ngokwethula uhlelo lwenhliziyo nemithambo yegazi ngendlela ecacile, ehlelekile, nekhanyisiwe, ukwakheka akufundisi nje kuphela kodwa futhi kugqugquzela inhlonipho ngobunkimbinkimbi nokusebenza kahle komzimba womuntu.

Ekugcineni, isithombe siphumelela ukuhlanganisa ukuqina kwesayensi nokucaca okubonakalayo. Igqamisa izingxenye zesakhiwo ezibaluleke kakhulu empilweni yenhliziyo nemithambo yegazi-inhliziyo, imithambo yegazi, kanye nemithambo-ngenkathi futhi ibamba ubuhle besistimu lilonke. Ibhalansi yokunemba kwe-anatomical, ukunikezwa kobuciko, nedizayini ehlanzekile idala indawo efundisayo futhi ekhangayo ngokubukeka, egcizelela indima ebalulekile yesistimu yenhliziyo nemithambo yegazi ekusekeleni ukuphila komuntu.

Isithombe sihlobene: I-Amino Acid Advantage: Indima ye-L-Arginine Ekujikelezeni, Ukuzivikela, kanye Nokubekezela