Classification of Animal Tissues

Classification of Animal Tissues

Classification of Animal Tissues Animal Tissues In multicellular animals, a group of similar cells along with intercellular substances perform a specific function. Such an organization is called tissue. The tissues arise from the undifferentiated cells of Primary Germ Layers i.e. Ectoderm, Mesoderm, and Endoderm. Features of tissues: These tissues form Read more…

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Phylum-Hemichordata

Phylum-Hemichordata

Phylum-Hemichordata These are recently added as a phylum under non-chordates, earlier these were considered as a sub-phylum under the phylum chordates. They possess a rudimentary structure in the collar region known as a stomochord, which is similar to a notochord in structure. The hemichordates are marine deuterostome animals, generally considered Read more…

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Examples of Platyhelminthes

Phylum Platyhelminthes

Phylum Platyhelminthes (Greek; platys= Flat; helmins = worms); The flatworms. Phylum Platyhelminthes includes 13000 species. These are found as free-living as well as parasitic life forms. These are also called Flatworms because of having a dorso-ventrally flattened body. Characteristics features of Phylum Platyhelminthes The Platyhelminthes are mostly parasitic and live Read more…

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Characteristics features of phylum Chordata

Phylum Chordata – Characteristics and Classification

Phylum Chordata – Characteristics and Classification All chordates possess these 5 primary characteristics including a notochord, dorsal and hollow nerve cord, endostyle or thyroid, pharyngeal slits, and a post-anal tail. The name is Chordates because of their characteristic feature “notochord”, which plays a significant role in chordate structure and movement.  Characteristics features of Chordates Read more…

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Example of aschelminthes

Phylum Aschelminthes or Nemathelminthes

Phylum Aschelminthes or Nemathelminthes (Greek; nema = thread; helmins = worm) The Roundworms In phylum Aschelminthes, the organisms are also called roundworms because the body is circular in cross-section. These organisms are endoparasites. They are cylindrical, unsegmented, and triploblastic animals. The roundworms are mostly parasitic and cause diseases in plants, Read more…

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