Ukwetyisa yinxalenye ebalulekileyo yokuphila kwabantu. Ngale nkqubo, abantu banokuthi bathathe indawo yezakha mzimba kukutya okusemizimbeni yethu nezinye izinto eziluncedo ukusigcina siphila. Kodwa oku akwenzeki ebantwini kuphela, zininzi izilwanyana kunye nezityalo ezenza lo msebenzi ukuze zisinde.
Zimbini iintlobo zezinto eziphilayo ezisebenzisa imisebenzi eyahlukeneyo ukuzondla kunye nokufumana amandla. Kukho izinto eziphilayo ze-heterotrophic, eziya kuthi zixhomekeke ekuboneleleni ngokwazo ngezinto ezingafunekiyo ukuze zikwazi ukugcina, ukukhula kunye nokusebenza. Izinto eziphilayo ze-Autotrophic (zizityalo kunye nezinto eziphilayo ze-photosynthetic) ziya kubamba amandla abo ngokukhanya, okuza kuguqula amandla amakhemikhali.
Yintoni ukugaya ebantwini?
Njengombono ophambili, ukwetyisa kukutshintsha kokutya yihydrolysis, eziya kujika zibe zizinto ezincinci ezibizwa ngokuba zizondlo. Ezi zinto ziya kuwela inwebu yeplasma ngokuphendula kwamachiza apho ziya kuncedwa zii enzymes. Le nkqubo yenzeka ikakhulu esiswini, nangona maninzi amanye amalungu ayinxalenye yenkqubo yokwetyisa.
Izinto ezisisiseko zoku kwenzeka koku kugaya zezi: umlomo, ulwimi, umphimbo, umqala, isisu, isibindi, injeke, ithumbu elincinci nelikhulu, i-rectum kunye ne-anus.
Kolu tshintsho lokutya lube zizinto, Ukucola ukutya linoxanduva lokwahlula izondlo kwityhefu nakwizinto eziyintsalela. Emva koko umzimba uya kuba uxanduva lokusasaza ezi zondlo kuwo wonke umzimba kwaye ke uya kuguqulwa ube ngamandla, into ebalulekileyo ekuziphiliseni. Ityhefu kunye nentsalela engathandekiyo iya kuba negunya lokugxothwa.
Kutheni kubalulekile ukwetyisa?
Kuba ibalulekile kuphuhliso lwethu nasekusindeni. Ngokutya ukutya sisitya izakhamzimba ezifana neeproteni, iivithamini, amafutha, iikhabhohayidrethi, izimbiwa kunye namanzi. Zizinto ezibalulekileyo ukuze siphile, sikhule, silungise imizimba yethu kwaye sibe namandla.
Inyathelo nenyathelo lokucola ukutya:
Ukwamkela
Ukugaya kuqala ngomlomo: singenisa ukutya emlonyeni kwaye senze isenzo somatshini esiquka ukuhlafuna kunye nokuphula ukutya ngoncedo lwee-molars kunye ne-salivary gland. Oko kubizwa ngokuba yibholus kuveliswa ukuba ngesenzo sokugwinya siya kudlula kwi-pharynx kwaye ukusuka apho ukuya kwi-esophagus.
Kwi-esophagus i-bolus yokutya iya kutyhilwa esiswini Enkosi ngokuhamba okuthile (i-perisaltics), kulapho inyathelo eliphambili lokwetyisa liyakwenzeka.
Ukwetyisa
Esiswini kulapho lo msebenzi wenzeka khona. Ngokushukuma kwezihlunu iijusi zesisu ziya kugcinwa ezizakwenza I-bolus iyatyhila kwaye kulapho iyiguqulela kwi-chyme.
Amadlala okwetyisa athatha inxaxheba kule nkqubo yokufihla ii-enzymes: Isibindi kunye ne-pancreas, eya kuba noxanduva lokuncedisa ukwahlula ukutya.
Ukufunxa
Kule nqanaba, i-chyme, bile kunye neencindi zokwetyisa zifikelela kumathumbu amancinci kwaye kulapho ke iveliswayo. inguqu ibe zizakhamzimba. Okwalo mzuzu kulapho sinokuthetha malunga nokwetyiswa kwemichiza, kwaye kuxa zonke ezi zinto zisenza inkqubo yazo ukuze i-chyme iphule zonke izibophelelo zeemolekyuli.
Ukutya
Yinxalenye yokugqibela yokwetyisa kwaye kulapho ithambo lithatha inxaxheba khona. Imalunga ne Inkqubo apho iityhefu kunye nenkunkuma engafunekiyo emzimbeni ziya kupheliswa. Yinto yonke engakhange ifunxwe ngamathumbu amancinci kwaye iguqulwe yenziwa sisondlo. Ezi nkunkuma ziguqulwa zenziwe ilindle, bahamba nge-rectum kwaye bagxothwe nge-anus. Okwangoku kuxa sithetha ngokufuduka okanye ukuzikhulula.