Qhov sib txawv tseem ceeb ntawm chordates thiab tsis chordates stems los ntawm lub xub ntiag thiab tsis muaj ib tug notochord. Chordates yog cov kab mob uas muaj qhov sib txawv notochord tsim rau hauv kab vertebral. Hauv qhov sib piv, tsis yog chordates yog cov kab mob uas tsis muaj qhov tsis sib xws lossis kab vertebral.
Chordates thiab tsis chordates yog ob phyla uas zwm rau lub nceeg vaj Animalia. Lawv yog cov yam ntxwv raws li thawj evolutionary yam ntxwv. Thaum evolution, tsiaj tsim ib tug notochord uas ua rau lawv Chordates.
Chordates yog dab tsi?
Chordates lossis vertebrates muaj plaub yam tseem ceeb uas paub qhov txawv ntawm cov tsis chordates. Cov yam ntxwv no tshwm sim nyob rau qee theem ntawm lub neej voj voog ntawm chordates. Cov plaub yam tseem ceeb yog;
- Notochord
- Pharyngeal slits, uas tseem hu ua gills
- Dorsal paj qaum uas txhim kho rau hauv lub paj hlwb thiab lub hlwb
- Post-anal tail
Daim duab 01: Chordates
Muaj peb lub ntsiab subphyla ntawm chordates; lawv yog:
- Vertebrata - Tsiaj txhu muaj nyob rau hauv cov chav kawm Pisces, Aves, Reptilia, Amphibia thiab Mammalia yog cov pab pawg no.
- Cephalochordata lossis Lancets - Tsiaj txhu uas muaj cephalization tseem ceeb.
- Urochordata - Tsiaj txhu uas muaj tus Tsov tus tw tseem ceeb lossis tom qab qhov quav. Cov kab mob xws li hiav txwv squirts belongs rau pawg no.
Dab tsi yog Chordates?
Non chordates, tseem hu ua invertebrates, tsis muaj ib tug notochord los yog ib tug vertebral kab. Ntxiv mus, pawg no suav nrog ntau yam kab mob hauv ntiaj teb.
Daim duab 02: Daim txhuam cev yog hom tsis muaj chordates
Tsis yog Chordates raug cais ntxiv rau hauv phyla:
- Porifera – Sponges belongs rau pab pawg no. Lawv yog cov qub tshaj plaws uas tsis muaj cev nqaij daim tawv.
- Cnidaria - Aurelia, Hydra, thiab lwm yam. nyob rau pawg no. Lawv yog cov tsiaj diploblastic nrog radial symmetry
- Platyhelminthes - Triploblastic flatworms
- Nematoda - Cov kab mob Roundworms uas yog triploblastic thiab ob sab sib luag
- Annelida - Triploblastic kab mob nrog segmented lub cev. Piv txwv: Nereis
- Mollusca - Lawv muaj cov yam ntxwv sab nrauv npog / plhaub. Piv txwv li: Chiton, Octopus
- Arthropoda - Lawv lub cev yog segmented heev, thiab feem ntau kab yog nyob rau hauv pawg no.
- Echinodermata - Feem ntau cov kab mob marine uas yog pentaradially symmetrical Piv txwv: Hiav txwv lily, hnub qub.
Dab tsi yog qhov zoo sib xws ntawm Chordates thiab Non Chordates?
- Ob leeg koom nrog lub Nceeg Vaj Animalia.
- Lawv yog ob hom kab mob ntau yam.
- Ob leeg muaj lub paj hlwb.
Qhov txawv ntawm Chordates thiab Tsis yog Chordates yog dab tsi?
Chordates vs Tsis yog Chordates |
|
| Chordates yog cov kab mob uas muaj qhov sib txawv ntawm qhov tsis sib xws uas tsim rau hauv kab vertebral. | Tsis yog Chordates yog kab mob uas tsis muaj ib tug notochord thiab yog li ntawd, ib tug vertebral kab. |
| Notochord | |
| Tsis muaj tus hlub | |
| Nerve Cord | |
| Ib leeg dorsal hollow paj qaum tam sim no | Ob chav ventral solid paj qaum yog tam sim no |
| Pharyngeal Slits | |
| Tam sim no ntawm qee theem ntawm lub neej voj voog | pharyngeal slits tsis tuaj |
| Post-Anal Tail | |
| Muaj tus nplaig tom qab qhov quav, tab sis qee zaum nws tsis yog qhov tseem ceeb | Tsis txhob muaj qhov quav tom qab |
| Cov Pigments ua pa | |
| Haemoglobin yog cov xim ua pa tseem ceeb | Ua pa pigments tsis nyob hauv RBCs |
| Cov kab mob hauv lub cev | |
| raum yog lub hauv paus excretory | Ntau hom kabmob muaj nyob rau kev tso tawm |
Summary – Chordates vs Non Chordates
Feem ntau, chordates thiab tsis chordates yog qhov txawv raws li qhov muaj thiab tsis muaj ib tug notochord. Chordates muaj ib qho tseem ceeb notochord, whereas tsis chordates tsis muaj ib tug notochord. Nws yog qhov sib txawv tseem ceeb ntawm chordates thiab tsis chordates. Ntxiv nrog rau qhov tseem ceeb no, lwm yam nta xws li cov hlab ntsha, tom qab lub qhov quav tail, thiab pharyngeal slits kuj tseem siv tau los qhia qhov txawv ntawm ob pawg.
