define phylum chordata
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Definition of chordate. : any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill slits and including the vertebrates, lancelets, and tunicates.
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A chordate (/kɔːrdeɪt/) is an animal belonging to the phylum Chordata; chordates possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail, for at least some period of their life cycle.
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┏─━─━─━─━∞◆∞━─━─━─━─┓
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┗─━─━─━─━∞◆∞━─━─━─━─┛
➧ Some Phylum in Animal Kingdoms are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❶❭ Porifera:-━━━━━━━━━━━━━━━☟
❱ Body is cylindrical & asymmetrical.
❱ Canal system is present.
❱ Cellular level of organisation.
❱ It is diploblastic.
❱ They reproduce by budding in Asexual Reproduction.
❱ Special cells are choanocytes.
❱ Skeleton is in the form of spicules.
▶Ex:- Sycon & Sponges
❷❭ Coelenterata:-━━━━━━━━━━━━━━━☟
❱ Body is Radially symmetrical.
❱ Canal system is absent.
❱ Tissue grade level of organisation.
❱ Body wall is diploblastic.
❱ Opening served by mouth & anus.
❱ Special Cell or Cnidoblasts.
❱ It occurs in the form of polyp & Medusa.
❱ It have gastrovascular cavity.
❱ It poses tentacles called Nematoblasts.
▶Ex:- Hydra & Jellyfish
❸❭ Platyhelminthes:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical, flattened & Ribbon shaped.
❱ Digestive system is absent or incomplete.
❱ Body cavity is absent.
❱ Body is triploblastic.
❱ It is bisexual or Hermaphrodite.
❱ Respiration is an aerobic.
❱ They possess sućker.
❱ Circulatory or respiratory system is absent.
▶Ex:- Planaria & Tape worm
❹❭ Nematoda:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical or cylindrical.
❱ Body has tissue level of organisation.
❱ It is mostly parasites organism.
❱ Body is triploblastic.
❱ Respiratory or circulatory system is absent.
❱ Sex are separate.
❱ They have tissue but no real organ.
▶Ex:- Ascaris & Hook worm
❺❭ Annelida:-━━━━━━━━━━━━━━━☟
❱ Body is cylindrical, bilaterally symmetrical & metamerically.
❱ Body structure ring-like segment.
❱ Respiration by gills or moist skin.
❱ Body is triploblastic.
❱ Excretory organs are nephridia.
❱ Digestive & circulatory system are well developed.
❱ Locomotory organs are parapodia.
❱ They have true body cavity.
▶Ex:- Earthworm & Leech
❻❭ Arthropoda:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical & segmented.
❱ Exoskeleton shed periodically during growth.
❱ Body is covered with non living exoskeleton.
❱ Body wall is triploblastic.
❱ Body divided into head, Thorax & abdomen.
❱ It have jointed appendages.
❱ It possess compound eyes & antennae.
❱ Respiration by gills, trachea & book lungs.
▶Ex:- Cockroach & Spider
❼❭ Mollusca:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical.
❱ Shell formed of calcium carbonate.
❱ Body covered with mantal & hard shell.
❱ Body is triploblastic & Coelomate.
❱ Body divided into head, foot & visceral mass.
❱ Foot is ventral & muscular.
❱ Respiration by gills or ctenida.
❱ Blood may be Black - blue.
▶Ex:- Octopus & Unio
❽❭ Echinodermata:-━━━━━━━━━━━━━━━☟
❱ Body is radially symmetrical.
❱ Body size is spherical or cylindrical.
❱ Body surface covered with spines.
❱ Body is triploblastic & have coelomic cavity.
❱ It possess power of regeneration.
❱ No head tail right & left side.
❱ Body differentiated into oral & aboral surface.
❱ It have water vascular system.
▶Ex:- Starfish & Antedon
❾❭ Chordata:-━━━━━━━━━━━━━━━☟
❱ Nerve cord hollow tubular & dorsal.
❱ Notochord is present.
❱ Heart is ventral.
❱ Circulatory system is always closed.
❱ RBCs are present.
❱ Endoskeleton is present.
❱ A series of pharyngeal gill-silts present in the pharyngeal wall.
_________
Thanks...✊
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛
➧ Some Phylum in Animal Kingdoms are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❶❭ Porifera:-━━━━━━━━━━━━━━━☟
❱ Body is cylindrical & asymmetrical.
❱ Canal system is present.
❱ Cellular level of organisation.
❱ It is diploblastic.
❱ They reproduce by budding in Asexual Reproduction.
❱ Special cells are choanocytes.
❱ Skeleton is in the form of spicules.
▶Ex:- Sycon & Sponges
❷❭ Coelenterata:-━━━━━━━━━━━━━━━☟
❱ Body is Radially symmetrical.
❱ Canal system is absent.
❱ Tissue grade level of organisation.
❱ Body wall is diploblastic.
❱ Opening served by mouth & anus.
❱ Special Cell or Cnidoblasts.
❱ It occurs in the form of polyp & Medusa.
❱ It have gastrovascular cavity.
❱ It poses tentacles called Nematoblasts.
▶Ex:- Hydra & Jellyfish
❸❭ Platyhelminthes:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical, flattened & Ribbon shaped.
❱ Digestive system is absent or incomplete.
❱ Body cavity is absent.
❱ Body is triploblastic.
❱ It is bisexual or Hermaphrodite.
❱ Respiration is an aerobic.
❱ They possess sućker.
❱ Circulatory or respiratory system is absent.
▶Ex:- Planaria & Tape worm
❹❭ Nematoda:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical or cylindrical.
❱ Body has tissue level of organisation.
❱ It is mostly parasites organism.
❱ Body is triploblastic.
❱ Respiratory or circulatory system is absent.
❱ Sex are separate.
❱ They have tissue but no real organ.
▶Ex:- Ascaris & Hook worm
❺❭ Annelida:-━━━━━━━━━━━━━━━☟
❱ Body is cylindrical, bilaterally symmetrical & metamerically.
❱ Body structure ring-like segment.
❱ Respiration by gills or moist skin.
❱ Body is triploblastic.
❱ Excretory organs are nephridia.
❱ Digestive & circulatory system are well developed.
❱ Locomotory organs are parapodia.
❱ They have true body cavity.
▶Ex:- Earthworm & Leech
❻❭ Arthropoda:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical & segmented.
❱ Exoskeleton shed periodically during growth.
❱ Body is covered with non living exoskeleton.
❱ Body wall is triploblastic.
❱ Body divided into head, Thorax & abdomen.
❱ It have jointed appendages.
❱ It possess compound eyes & antennae.
❱ Respiration by gills, trachea & book lungs.
▶Ex:- Cockroach & Spider
❼❭ Mollusca:-━━━━━━━━━━━━━━━☟
❱ Body is bilaterally symmetrical.
❱ Shell formed of calcium carbonate.
❱ Body covered with mantal & hard shell.
❱ Body is triploblastic & Coelomate.
❱ Body divided into head, foot & visceral mass.
❱ Foot is ventral & muscular.
❱ Respiration by gills or ctenida.
❱ Blood may be Black - blue.
▶Ex:- Octopus & Unio
❽❭ Echinodermata:-━━━━━━━━━━━━━━━☟
❱ Body is radially symmetrical.
❱ Body size is spherical or cylindrical.
❱ Body surface covered with spines.
❱ Body is triploblastic & have coelomic cavity.
❱ It possess power of regeneration.
❱ No head tail right & left side.
❱ Body differentiated into oral & aboral surface.
❱ It have water vascular system.
▶Ex:- Starfish & Antedon
❾❭ Chordata:-━━━━━━━━━━━━━━━☟
❱ Nerve cord hollow tubular & dorsal.
❱ Notochord is present.
❱ Heart is ventral.
❱ Circulatory system is always closed.
❱ RBCs are present.
❱ Endoskeleton is present.
❱ A series of pharyngeal gill-silts present in the pharyngeal wall.
_________
Thanks...✊
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