• MOVEMENTS IN FISH
    BIOLOGY

    MOVEMENTS IN FISH

    Swimming movements Each side of the vertebral column (flexible backbone) of a fish is made of muscle blocks or myotomes. The muscle blocks are arranged in a zig-zag fashion from head to tail. Each muscle block starts from the transverse…

  • MOVEMENTS IN HYDRA AND EARTHWORM
    BIOLOGY

    MOVEMENTS IN HYDRA AND EARTHWORM

    Movements in Hydra  1) Swaying Sometimes Hydra comes to rest on rock or other suitable hard surface in water and fixes itself temporarily with mucus substances at the basal disc. Even when Hydra is fixed, it is continuously swaying and…

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