1, Khoom siv: feem ntau ua los ntawm cov yas kho mob mos, cov khoom siv muaj kev nyab xeeb thiab huv, tsis txhawb lub qhov ncauj thiab caj pas, tsim nyog rau kev saib xyuas qhov ncauj thiab cov hnoos qeev yuav tsum tau hu rau lub qhov ncauj thiab caj pas mucosa zaus.
2, qauv: Nws feem ntau yog slender, qhov ntev yog feem ntau yog 20-30cm, ib kawg yog lub raj, ib kawg yog lub qhov ncauj nqus lub taub hau, lub taub hau nqus feem ntau yog ua los ntawm yas, tuaj yeem nqus cov qaub ncaug thiab hnoos qeev. hauv qhov ncauj thiab caj pas.
3, kev siv ib zaug: feem ntau yog siv rau ib zaug, kom tsis txhob kis kab mob, ua kom muaj kev nyab xeeb thiab kev noj qab haus huv.
4, kev nyab xeeb: thaum siv yuav tsum ua tib zoo saib xyuas kev nyab xeeb kom tsis txhob raug mob rau cov neeg mob lossis cov neeg ua haujlwm kho mob.