Cov dev yog cov tsiaj me uas ntse heev, peb yuav tsum siv qhov zoo ntawm cov dev no kom lawv zoo dua. Raws li tus tswv tsev dev, peb yuav tsum ua kom tiav peb lub luag haujlwm, yog li peb yuav tsum paub qee yam kev cob qhia hauv lub ntsej muag ntawm cov menyuam dev. Piv txwv li, thaum peb pub zaub mov rau dev, peb tuaj yeem muab cov zaub mov tso rau hauv qhov chaw siab dua, thiab tom qab ntawd ua kom cov dev hnov tsw tsw, kom lawv tsis tuaj yeem pab ntsia, peb tuaj yeem yooj yim muab tus dev lub forelimbs upward Lift, ces cob qhia. lawv pem hauv ntej paws thiab txoj kev yawning. Nyob rau hauv txoj kev no, peb tus dev yuav yooj yim heev los tuav qhov tseem ceeb.
