Life of chordata

Dear student,

​​​​​​Animals which belongs to the phylum -Chordata is the characterized by the presence of a notochord( a solid rod- like structure) which is present on the dorsal side of the body, a dorsal hollow nerve cord( a hollow tube-like structure) present on the dorsal side of the body, the front side of the nerve cord forms the brain while the end side forms the spinal cord and paired pharyngeal gill slits( these helps in the communication with the exterior and present as anopening on the sides of the pharynx. They also have post-anal tail.

Chordata is the bilaterally symmetrical and are triploblastic and having organ level of organization ( hepatic portal system is present, the digestive system is well-developed and the excretion is done through kidneys).

Thank you!

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Chordate, any member of the phylum Chordata, which includes the vertebrates (subphylum Vertebrata), the most highly evolved animals, as well as two other subphyla?the tunicates (subphylum Tunicata) and cephalochordates (subphylum Cephalochordata). Some classifications also include the phylum Hemichordata with the chordates.

As the name implies, at some time in the life cycle a chordate possesses a stiff, dorsal supporting rod (the notochord). Also characteristic of the chordates are a tail that extends behind and above the anus, a hollow nerve cord above (or dorsal to) the gut, gill slits opening from the pharynx to the exterior, and an endostyle (a mucus-secreting structure) or its derivative between the gill slits. (A characteristic feature may be present only in the developing embryo and may disappear as the embryo matures into the adult form.) A somewhat similar body plan can be found in the closely related phylum Hemichordata.
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l hope, it helps.
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