Isiqalo sokukhula kabusha kwezitho zomuntu

Izibonelo zokuzalwa kabusha zigcwele embusweni wezilwane:  izibankwa namasalamanders zikhulisa izitho nemisila ngaso sonke isikhathi, i-ditto nge-starfish. https://blogs.scientificamerican.com/guest-blog/regeneration-the-axolotl-story/

I-Planaria idume kabi (futhi mhlawumbe ayifuni) ababambiqhaza ekuhloleni ukukhula kwamakhanda amabili (https://www.youtube.com/watch?v=roZeOBZAa2Q). Akukhona ukuthi sifuna ukuba namakhanda amabili, kodwa kungani abantu bengakwazi ukukhulisa izitho ezilahlekile, izingalo noma imilenze? 

Nakuba amanye amangqamuzana emizimbeni yethu enamandla okuvuselela—ukuphulukiswa kwesikhumba, ulwelwesi lwamathumbu ethu, isibindi sethu—akwenza lokho ngendlela elinganiselwe. I-credo yakudala ku-biology iwukuthi lapho umsebenzi weseli noma izicubu ukhethekile kakhulu, amandla ayo okuphinde akhule ayancipha. Njengoba abantu bekhuphukela esitebhisini sokuziphendukela kwemvelo, amaseli ethu amaningi adlule iphoyinti lokuhlukanisa elingenambuyiselo:  ungase ukhulise ezinye zezinwele zakho emuva, kodwa umunwe onqunyiwe uhlala uyisiphunzi.

Ulwazi lwethu olukhulayo kuma-stem cells-namandla awo okuhlukanisa-- kwenze ukuvuselelwa kwezicubu eziyinkimbinkimbi kube yinto engenzeka. Eqinisweni, uDkt Levin emsebenzini wakhe uye wafakazela ukuthi amasignali e-bioelectric aqala ukuhlukaniswa kwamaseli nezicubu. Funda ngempumelelo yakhe ekuvuseleleni okuvuselela ugesi ezilwaneni ezihlala emanzini nasezweni: https://www.popsci.com/body-electrician-whos-rewiring-bodies

Ingalo noma umlenze inhlanganisela eyinkimbinkimbi yesikhumba, ithambo, imisipha, imizwa kanye nezicubu zemithambo zonke ezinemisebenzi ehlukene. Iqhinga liwukuthola amasiginali alungile ukuze kuvuswe ingqamuzana elifanele likakhokho ekukhuleni libe yilezi zakhiwo ezithile.

Uma lezi zimpawu sezivuliwe, isithiyo esisele ukuthi singayigcina kanjani le nqubo iqhubeka—futhi lokho kuhilela ukulwa nezinqubo zethu zokuphulukisa esizalwa nazo. Lapho umzimba uzwa ukulimala uzama ukuvala noma yiziphi izindawo ezivelile ngokulahla i-collagen endaweni egcina iba yizibazi. Lokhu kungase kuphumelele ekuvaleni isilonda, kodwa kubeka indawo elimele esimweni esingasebenzi.

Isixazululo siwukugcina indawo ‘yokuphulukisa’ ingaphakathi kwendawo ene-hermetic lapho ilungele ukukhula kwezicubu. Ukugcina isitho esikhulayo kulokhu ‘kugeza okunomsoco’ okuphathekayo kukhuthaza inqubo yokuphulukisa kuyilapho kugcinwe kuvikelekile ekuthelelekeni noma ekulimaleni. 

Le modeli yetiyetha iye yahlongozwa: https://www.popsci.com/how-to-grow-an-arm