Lub ntiaj teb ntawm fauna muaj ntau sab thiab ntau yam. Txhua yam muaj sia nyob hauv ntiaj teb tau muab faib ua hom. Ib tug ntawm lawv yog phylum Arthropoda. Nws muaj txog 2 lab hom thiab yog sawv cev los ntawm peb chav kawm: arachnids, kab thiab crustaceans.
Kev tsim kho
Txhua tus arthropods, tsis hais chav kawm, zoo ib yam. Yog li, lawv muaj lub cev sib luag, uas tau muab faib ua ob peb ntu - ntu. Feem ntau muaj peb. Ntawm no, lub plab, lub taub hau thiab hauv siab yog qhov txawv. Qee zaum ob ntu kawg ua ke. Lawv tsim lub taub hau. Lub cev ntawm arthropods yog them nrog hypodermis thiab chitinous cuticle, uas yog ib yam dab tsi zoo li ib tug sab nrauv skeleton. Kuj tseem muaj ob peb ob txhais ceg uas nthuav tawm ntawm ntu mus rau sab. Hom arthropod txawv los ntawm lwm yam invertebrates nyob rau hauv uas ob txhais ceg ntawm nws cov neeg sawv cev muaj ob peb qhov chaw, ntawm uas resilin (ib tug elastic proteins) muaj. Ua tsaug rau nws, tus tsiaj tuaj yeem dhia.
Circulatory system
Lub cev kab noj hniav ntawm cov tsiaj uas sawv cev rau hom arthropods yog ib qho mixocoel. Nws yog tsim vimKev sib txuas ntawm cov hnab coelomic nrog blastocoel. Cov kua dej hauv lub cev yog hu ua hemolymph. Nws sib tov nrog cov ntshav thiab circulates nyob rau hauv lub nruab nrog cev, nruab nrab ntawm lawv, raws li zoo raws li nyob rau hauv tsis zoo tsim cov hlab ntsha. Raws li rau lub circulatory system, nws tsis raug kaw. Arthropods muaj lub plawv. Nws yog sawv cev los ntawm cov hlab ntsha txha caj qaum, uas tau txais ib qho zoo. Los ntawm sab qhib, lub npe hu ua ostia, uas muaj li qub, lub hemolymph nkag mus rau hauv lub plawv.
Y
Digestive system
Lub plab zom mov ntawm arthropods yog sawv cev los ntawm cov ntu tom qab, sab hauv thiab nruab nrab. Cov raj tshwj xeeb yog subdivided rau hauv cov sectors. Ntawm lawv yog pharynx, plab, esophagus. Tsis tas li ntawd, muaj ib tug hepatic outgrowth, vim hais tias cov enzymes secreted. Lub qhov ncauj ntawm arthropods yog complex.
Respiratory system
Zoo nyob ntawm qhov chaw nyob ntawm arthropod, nws txoj kev ua pa yuav zoo li lub ntsws, gills, thiab cov kav dej. Tab sis lawv nyob rau hauv lawv cov me nyuam mos. Pulmonary sacs (ntsws) nyob rau hauv cov ntaub ntawv no yog outgrowths ntawm lub cev phab ntsa, muaj ib tug zoo li nplooj zoo li nplooj thiab qhia nyob rau hauv lub cev kab noj hniav. Lawv txuas nrog qhov sib txawv ua pa. Lub tracheae yog tsim los ntawm ntau yam tubules, uas muaj chitinous rings nyob rau hauv. Kev sib pauv roj hauv cov tsiaj no tshwm sim vim yog hemolymph, uas xa cov pa oxygen rau tag nrho cov ntaub so ntswg.
Nervous system
CentralLub paj hlwb ntawm arthropods yog tsim los ntawm lub hlwb thiab cov hlab ntsha. Nws yog nyob rau hauv lub peritoneum. Cov saw hlau muaj kev sib txuas ntawm cov hlab ntsha hauv thaj chaw plab, lub taub hau thiab thoracic, vim tias cov tsiaj ntawm hom no muaj cov kab mob zoo li no.
Lwm yam
Raws li rau cov kab mob excretory, nws yog sawv cev los ntawm cov hlab ntsha malpighian thiab metanephridia. Tsiaj txhu ntawm hom arthropod yog heterosexual, thiab nrog kev hais tawm dimorphism. Cov leeg nqaij kuj muaj nyob rau hauv cov tsiaj no thiab yog sawv cev los ntawm cov ntaub so ntswg striated.
