Mention four characteristics arthropoda group
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Arthropods, members of the phylum Arthropoda, are a diverse group of animals including insects, crustaceans, spiders, scorpions and centipedes. However, the members of this phylum, despite their incredible diversity and sheer numbers, share a number of important distinguishing characteristics.
Exoskeleton
Arthropods are invertebrates, which means their bodies do not have internal bones for support. To compensate for this, they produce a hard exoskeleton made of chitin, a mixture of lipids, carbohydrates and protein, which covers and protects their bodies like a suit of armor. As arthropods grow, they must shed or molt their exoskeletons. They first produce new, softer exoskeletons underneath the old ones. Once their hardened, old coverings crack and shed, they sport roomier, albeit soft, exoskeletons. Arthropods are incredibly vulnerable during the molting process, and will often hide until their new exoskeletons harden.
Segmented Bodies
Arthropods have bodies that are internally and externally segmented. The number of segments depends on the individual species; millipedes, for example, have more segments than lobsters.
Jointed Appendages
The name arthropod actually comes from the Greek “arthro,” meaning joint, and “pod,” meaning foot. All arthropods have jointed limbs attached to their hard exoskeletons that allow for flexibility and movement. The joints generally bend in only one direction but allow for sufficient predatory and defensive actions.
Bilateral Symmetry
An arthropod's body can be divided vertically into two mirror images. This is called bilateral symmetry. An arthropod shares this symmetry with many other animals such as fish, mice and even humans. Other animals such as the jellyfish and sea star exhibit radial symmetry, while coral and sea sponge are asymmetrical -- exhibiting no pattern at all.
Exoskeleton
Arthropods are invertebrates, which means their bodies do not have internal bones for support. To compensate for this, they produce a hard exoskeleton made of chitin, a mixture of lipids, carbohydrates and protein, which covers and protects their bodies like a suit of armor. As arthropods grow, they must shed or molt their exoskeletons. They first produce new, softer exoskeletons underneath the old ones. Once their hardened, old coverings crack and shed, they sport roomier, albeit soft, exoskeletons. Arthropods are incredibly vulnerable during the molting process, and will often hide until their new exoskeletons harden.
Segmented Bodies
Arthropods have bodies that are internally and externally segmented. The number of segments depends on the individual species; millipedes, for example, have more segments than lobsters.
Jointed Appendages
The name arthropod actually comes from the Greek “arthro,” meaning joint, and “pod,” meaning foot. All arthropods have jointed limbs attached to their hard exoskeletons that allow for flexibility and movement. The joints generally bend in only one direction but allow for sufficient predatory and defensive actions.
Bilateral Symmetry
An arthropod's body can be divided vertically into two mirror images. This is called bilateral symmetry. An arthropod shares this symmetry with many other animals such as fish, mice and even humans. Other animals such as the jellyfish and sea star exhibit radial symmetry, while coral and sea sponge are asymmetrical -- exhibiting no pattern at all.
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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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