Cov qauv tag nrho ntawm annelids tsis txawv ntau npaum li cas piv rau lwm cov phyla. Tag nrho cov annelids muaj tus kab mob zoo li tus kab mob, segmented lub cev, tab sis ib qho tseem ceeb sib txawv ntawm lawv yog tus naj npawb thiab lub koom haum ntawm bristles thiab appendages. Annelids yog ob sab symmetrical, triploblasts, thiab protostomes.
Tus qauv ntawm annelids yog dab tsi?
Lub cev ntawm ib qho annelid feem ntau piav raws li ib lub raj hauv ib lub raj. Lub raj sab hauv, lossis lub plab zom mov, yog cais los ntawm cov raj sab nraud, lossis lub cev phab ntsa, los ntawm coelom. Lub taub hau cheeb tsam (prostomium) yog ua raws los ntawm ib tug series ntawm ntu zoo sib xws nyob rau hauv tsos.
Daim ntawv thiab kev ua haujlwm ntawm annelid yog dab tsi?
Annelids yog segmented worms xws li earthworms thiab leeches. Annelids muaj coelom, kaw cov hlab ntsha, excretory system, thiab ua tiav digestive system. Lawv kuj muaj hlwb. Earthworms yog ib qho tseem ceeb deposit feeders uas pab tsim thiab ntxiv av.
Dab tsi yog qhov tshwj xeeb ntawm lub cev qauv ntawm lub annelid?
Annelids muaj lub cev npog los ntawm lub cuticle sab nraud uas tsis tau tso los yog molted. Epidermal microvilli secrete lub network ntawm fibers uas yog ib feem ntawm collagenous thiab kuj muaj scleroprotein. Chaetae kuj yog cov txheej txheem cuticular, tab sis muaj ntau cov chitin.
Yuav muaj pes tsawg lub siab?
Nyob hauv av, uas yog kab tias nrov tshaj plaws ntawm tag nrho cov annelids, muaj tsib lub plawv-zoo li cov qauv hu ua aortic arches. Nrog rau dorsal thiab ventral hlab ntsha, lub aortic arches pab cov ntshav ntws los ntawm lub kaw circulatory system thiab ncav cuag ob kawg ntawm lub cev.
