Qhov sib txawv tseem ceeb ntawm limbless amphibians thiab nab nyob ntawm lawv qhov tsos. Limbless amphibians tsis muaj cov nplai ntawm lawv daim tawv nqaij, thiab lawv ob lub qhov muag tau npog. Ntawm qhov tod tes, nab muaj cov nplais pom ntawm lawv daim tawv nqaij, thiab lawv qhov muag pom.
Ob leeg tsis muaj amphibians thiab nab muaj qhov zoo sib xws nrog rau lawv lub cev, qhov loj me thiab hom kev txav chaw. Yog li ntawd, nws yog ib qho tseem ceeb kom paub qhov txawv ntawm cov nab thiab limbless amphibians vim limbless amphibians feem ntau tau misidentified li nab. Nws yog qhov tseeb uas feem ntau cov neeg ntshai nab. Yog li ntawd, lawv nyiam tua lawv ib zaug pom. Vim muaj kev qhia tsis tseeb, cov neeg tsis muaj zog amphibians uas tsis muaj kev phom sij rau tib neeg kuj dhau los ua neeg raug tsim txom.
Dab tsi yog Limbless Amphibians?
Legless amphibians los yog Caecilians yog cov xim tsaus nti limbless kab txaij nrog daj kab txaij nyob rau sab ventral ntawm lawv lub cev. Cov kab mob no muaj nyob rau ntawm qhov kev txiav txim Gymnophiona uas muaj ntau dua 180 hom uas tau txheeb xyuas txog tam sim no. Caecilians tau muab faib rau hauv thaj chaw sov ntawm South thiab Southeast Asia, Africa, thiab South America.
Cov qauv tsim, lawv txawv ntawm qhov loj ntawm tus kab me me mus txog qhov loj ntawm ntau tshaj 150cm ntev. Tsis tas li ntawd, lawv muaj cov tawv nqaij mos thiab du. Tsis tas li ntawd, cov nplai calcite muaj nyob hauv qab lawv daim tawv nqaij, tab sis tsis muaj cov nplais nyob hauv cov nab. Caecilian daim tawv nqaij tshwm segmented vim nws muaj annuli; i.e., lub nplhaib-zoo li lub voj voog. Cov kab mob no feem ntau nyob hauv qhov chaw ntub dej lossis ntub dej thiab tseem nyob hauv dej hiav txwv. Tsis tas li ntawd, terrestrial caecilians nteg qe los yog yug me nyuam thaum cov dej caecilians yug rau larvae.
Daim duab 01: Limbless Amphibian
Caecilians feem ntau yog cov kab mob fossorial nrog lub pob txha taub hau muaj zog. Siv qhov ntawd, lawv ua tunnels thiab txav mus los ntawm cov av. Ntxiv mus, caecilians ua pa los ntawm lub ntsws, daim tawv nqaij thiab qhov ncauj kab noj hniav. Raws li kev hloov kho rau txoj kev ua neej fossorial, txheej tawv nqaij npog lub qhov muag caecilian. Yog li ntawd, lawv ob lub qhov muag tsis ua haujlwm. Caecilians muaj cov hniav zoo li rab koob los noj cov kab, me nab, worms thiab qav thiab lwm yam. Txawm li cas los xij, cov ntaub ntawv hais txog Caecilians noj thiab zom yog tsawg.
Dab tsi yog nab?
Nab yog cov tsiaj reptiles uas tsis muaj zog uas muaj nyob rau hauv qhov kev txiav txim Squamata thiab chav Reptilia nyob rau hauv phylum Chordata. Yog li ntawd, lawv yog ib pawg neeg sib txawv ntawm cov kab mob nrog 2900 hom kev txheeb xyuas. Txawm hais tias nab tsis limbless, rudimentary ceg muaj nyob rau hauv pythons. Yog li, qhov tseeb no qhia tau hais tias cov pythons yog thawj zaug hloov zuj zus li nab. Anatomically, nab muaj lub cev ntev uas muaj li ntawm 10 cm mus rau ib tug ntev ntawm 8 meters. Cov nplais nyob rau ntawm daim tawv nqaij npog tag nrho lawv lub cev. Lawv cov tsos (xim thiab qauv) ntawm cov nplai sib txawv ntawm cov hom. Yog li ntawd, cov nplais dhau los ua qhov tseem ceeb rau kev txheeb xyuas ntau hom nab.
Lawv muaj qhov pom kev zoo, thiab lawv tsuas yog ua pa hauv ntsws xwb. Snakes nyob hauv ob qho tib si hauv dej thiab thaj av ib puag ncig. Feem ntau ntawm cov nab yog tsis muaj venomous. Txawm li cas los xij, qee hom nab yog venomous. Lawv txhaj cov venom kom tuag tes tuag taw thov Vajtswv thiab pub rau nws. Venomous nab muaj peev xwm tua tau txhua yam kab mob nyob. Cov nab uas tsis yog venomous siv ntau cov tswv yim rau predation. Txawm li cas los xij, ob hom nab nqos lawv cov tsiaj tsis zom.
Daim duab 02: Nab
Tsis tas li ntawd, nab muaj peev xwm ciaj sia nyob rau hauv ib puag ncig sib txawv. Piv txwv li, thaum tsis muaj dej, nab nqus dej hauv lawv lub cev. Ntxiv mus, uric acid yog lawv cov khoom tseem ceeb hauv excretory uas khaws cov dej hauv lawv lub cev.
Dab tsi yog qhov zoo sib xws ntawm Limbless Amphibians thiab nab?
- Ob leeg limbless Amphibians thiab Snakes muaj lub cev cylindrical.
- Ob hom tsis limb
- Kuj, ob leeg muaj cov tawv nqaij moist,
- Nyob rau hauv ob hom, hom ntawm locomotion yog gliding thiab ua luam dej.
Qhov txawv ntawm Limbless Amphibians thiab nab yog dab tsi?
Limbless amphibians thiab nab zoo sib xws vim lawv yog cov kab mob limbless. Tab sis lawv nyob rau ob pawg tsiaj sib txawv. Limbless amphibians tsis muaj nplai ntawm lawv daim tawv nqaij thaum nab muaj. Yog li ntawd, qhov no yog qhov sib txawv tseem ceeb ntawm limbless amphibians thiab nab. Tsis tas li ntawd, limbless amphibians ob lub qhov muag tseem kaw thaum lub qhov muag nab tseem qhib. Yog li, nws yog lwm qhov sib txawv ntawm limbless amphibians thiab nab.
Cov sawv cev infographic hauv qab no qhia txog cov ntaub ntawv ntau ntxiv ntawm qhov sib txawv ntawm limbless amphibians thiab nab.
Summary – Limbless Amphibians vs Snakes
Vim qhov zoo sib xws ntawm sab nrauv, limbless amphibians feem ntau tau qhia tsis raug raws li nab. Tab sis los ntawm kev soj ntsuam ze dua, ob hom kab mob no tuaj yeem txheeb xyuas nyias. Kev muaj cov nplai ntawm daim tawv nqaij ntawm nab yog qhov tseem ceeb ntawm kev sib txawv. Tsis tas li ntawd, physiologically txawv cov yam ntxwv ua rau peb paub qhov txawv ntawm ob hom kab mob no. Tsis zoo li qee hom nab, limbless amphibians tsis muaj teeb meem rau tib neeg. Nov yog qhov txawv ntawm limbless amphibians thiab nab.
