Nta ntawm digestion nyob rau hauv cov noog

Lub digestive system ntawm noog muaj ib tug xov tooj ntawm tshwj xeeb nta. Nws hloov thaum lub sij hawm evolution thiaj li yuav txo tau lub cev nyhav ntawm tus noog thiab cia nws ya.

Thawj cov zaub mov hauv cov noog tsis tshwm sim nyob rau hauv lub qhov ncauj kab noj hniav, xws li nyob rau hauv lwm yam tsiaj, tab sis nyob rau hauv lub goiter - ib tug tshwj xeeb expansion ntawm txoj hlab pas. Nyob rau hauv nws, cov zaub mov softens thiab yog ib feem ntawm digested. Hauv qee cov noog, tshwj xeeb yog flamingos thiab pigeons, phab ntsa ntawm goiter secrete lub npe hu ua "noog lub mis". Cov tshuaj no zoo ib yam li dawb curd loj thiab nrog nws pab cov noog pub lawv cov xeeb ntxwv. Interestingly, nyob rau hauv penguins, "noog lub mis" yog tsim nyob rau hauv lub plab. Qhov no ua rau nws fatter thiab pab txhawb cov menyuam qaib nyob rau sab qaum teb hnyav.

Lub plab ntawm cov noog yog qhov txawv los ntawm qhov tseeb tias nws muaj ob ntu: cov leeg thiab cov qog. Ua ntej, cov zaub mov, ib feem ua tiav hauv cov qoob loo, nkag mus rau hauv glandular seem thiab impregnated muaj enzymes thiab hydrochloric acid. Tom qab ntawd nws nkag mus rau hauv cov leeg nqaij ntawm lub plab, qhov twg cov txheej txheem ntawm digestion tshwm sim. Qhov no ntawm lub plab muaj cov leeg muaj zog. Vim lawv txo qis, cov zaub mov yog tov kom zoo dua soaking nrog digestive kua txiv. Tsis tas li ntawd, kev sib tsoo ntawm cov khoom noj yog nqa tawm hauv cov leeg nqaij ntawm lub plab.

Nyob rau hauv tus txheej txheem ntawm evolution, noog tau poob lawv cov hniav thiab yog li tsis tuaj yeem zom thiab zom zaub mov. Lub luag haujlwm ntawm lawv cov hniav yog ua si los ntawm pebbles me me. Cov noog nqos pob zeb, pebbles thiab plhaub pob zeb, uas tom qab ntawd nkag mus rau hauv cov leeg nqaij ntawm lub plab. Nyob rau hauv kev cuam tshuam ntawm contractions ntawm nws cov phab ntsa, pebbles zom cov khoom ntawm cov khoom noj. Ua tsaug rau qhov no, kev noj qab haus huv digestion thiab assimilation ntawm tag nrho cov khoom noj tau txais kev txhawb nqa.

Thaum tsis muaj pebbles nyob rau hauv cov leeg nqaij ntawm cov noog, o ntawm nws phab ntsa tshwm sim - cuticulitis. Tias yog vim li cas noog yuav tsum tau ntxiv gravel tshwj xeeb rau lub feeder (piv txwv li, 8in1 Ecotrition gravel). Pob zeb yog tsim nyog rau txhua tus noog yam tsis muaj kev zam. Thaum nws tsis tuaj, koj tuaj yeem pom qhov xaiv ntawm cov noog hauv kev noj zaub mov. Raws li txoj cai, tus tsiaj feathered pib tsis kam cov nplej tawv, xaiv cov mos mos, yooj yim digestible. Qhov no ua rau muaj kev tsis sib haum xeeb hauv kev noj zaub mov thiab, vim li ntawd, ua rau cov kab mob metabolic.

Pob zeb thiab pebbles uas tau ua haujlwm rau lawv lub luag haujlwm nkag mus rau hauv cov hnyuv thiab tawm los ntawm cloaca. Tom qab ntawd, tus noog rov pom thiab nqos pebbles tshiab.

Cov hnyuv ntawm noog yog luv heev, nws yog emptied sai sai.

Xws li cov yam ntxwv zoo kawg nkaus ntawm kev zom cov noog muab qhov txo qis hauv lawv lub cev qhov hnyav thiab yog kev yoog rau kev ya davhlau.

Tsis txhob hnov ​​​​qab txog cov zaub mov zoo thiab muaj cov pob zeb hauv lub tawb, thiab koj tus phooj ywg winged yuav ib txwm zoo siab rau koj nrog nws kev noj qab haus huv thiab kev ua ub no.