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'''ক'ৰডাটাবোৰৰডাটা'''বোৰ (Chordates, {{IPAc-en|ˈ|k|ɔr|d|eɪ|t|s}}) হ'ল [[প্ৰাণী]] যিবোৰৰ, এডাল পৃষ্ঠ ৰজ্জু, এডাল ফোপোলা পৃষ্ঠীয় স্নায়ু ৰজ্জু, [[pharyngeal slit]], এডাল [[endostyle]], আৰু অন্ততঃ জীৱন চক্ৰৰ কিছু কালৰ বাবে এডাল নেজ থাকে । Taxonomicallyবৰ্গানুসৰি, theএই phylumপৰ্বটোৱে includesউপপৰ্ব the'''মেৰুদণ্ডী''' subphyla [[vertebrate|(Vertebrata]]), includingযেনে- [[mammal]]sস্তন্যপায়ী, [[fish]]মৎস, [[amphibian]]sউভচৰ, [[reptile]]sসৰিসৃপ, [[birdচৰাই]]s; [[Tunicate|'''টিউনিকাটা''' (Tunicata]]), includingযেনে - [[salp]]s andআৰু [[sea squirt]]s; andআৰু [['''চেফালকৰডাটা'''ক (Cephalochordata]],) comprisingসাঙুৰি the [[lancelet]]s. Members of the phylum Chordata are [[bilateral symmetry|bilaterally symmetric]], [[deuterostome]] [[coelom|coelomates]], and the vertebrate Chordates display [[Segmentation (biology)|segmentation]].লয় ।
ক'ৰডাটাৰ ৭৫,০০০ জীৱীত সদস্যৰ, প্ৰায় অৰ্ধেকেই [[Osteichthyes]] শ্ৰেণাৰ অন্তৰ্গত '''বনী ফিছ''' (bony fish) । [[পৃথিৱী]]ৰ, আটাইতকৈ বৃহৎ আৰু ক্ষিপ্ৰতৰ প্ৰাণী, ক্ৰমে '''নীলা তিমি''' (blue whale) আৰু '''peregrine falcon''',মানুহৰ দৰেই ক'ৰডাটা<ref><span class="plainlinks">[http://www.accessscience.com/abstract.aspx?id=133700&referURL=http%3a%2f%2fwww.accessscience.com%2fcontent.aspx%3fid%3d133700 AccessScience.com]</span>. Retrieved 23 December 2012.</ref>
The phylum [[Hemichordata]] including the [[acorn worm]]s has been presented as a fourth chordate subphylum, but it now is usually treated as a separate phylum. It, along with the phylum [[Echinoderm|Echinodermata]], including [[starfish]], [[sea urchins]], and [[sea cucumber]]s and their kin, are the chordates' closest relatives. Primitive chordates are known from at least as early as the [[Cambrian explosion]].
Of the more than 75,000 living species of chordates, about half are bony fish of the class [[Osteichthyes]]. Both the world's largest and fastest animal, the [[blue whale]] and [[peregrine falcon]], respectively, are chordates, as are [[human]]s.<ref><span class="plainlinks">[http://www.accessscience.com/abstract.aspx?id=133700&referURL=http%3a%2f%2fwww.accessscience.com%2fcontent.aspx%3fid%3d133700 AccessScience.com]</span>. Retrieved 23 December 2012.</ref>
==Overview of affinities==
A tetrapod (Greek tetrapoda, "four-legged") is a vertebrate animal having four feet, legs or leglike appendages. Since amphibians, reptiles, dinosaurs and mammals are all tetrapods, and even birds and snakes are tetrapods by descent, the term is only really useful in describing the earliest tetrapods, which radiated from the Sarcopterygii, or "lobe-finned" fishes, into air-breathing amphibians in the Devonian period.
===Origin of name===
==Definition==
{{Annotated image | caption=[[cephalochordate]] ''[[Amphioxus]]''ৰ বিবচ্ছেদ । সকলো ক'ৰডাটাৰ জীৱনৰ কিছুমান বিন্দুৰ উপাদান বোৰ দেখুওৱা হৈছে, যিবোৰে ইহঁতক অন্য পৰ্বৰ পৰা পৃথক কৰে ।
| image=BranchiostomaLanceolatum PioM.svg | width=400 | image-width=400 | height=340
{{Annotation|200|305|19 {{=}} যকৃৎ সদৃশ থলী (হেপাটিক চিকাম) }}
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==তথ্য সংগ্ৰহ==
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