Question

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Around the base of sea star spines are minute___with tiny jaws. tube feet skin gills ossicles pedicellariae tentacles Water enters the water vascular system of a sea star through a porous plate on the aboral surface called the Aristotle's lantern. Pedicellariae. Madreporite or sieve plate Pedicellariae Ambulacrum The___have an extensive internal branching respiratory tree and can eviscerate gut tubules as a means of defends. sea cucumbers sea stars sea urchins sea daises feather stars

Answer 1

15] Around the base of sea star spine are minute tube feet with tiny jaws

16] water enter the water vascular system of a sea star through a porous plate on the aboral surface

Called      

Madreporite or sieve plate

17] The Sea Cucumbers     have an extensive internal branching respiratory tree and can eviscerate gut tubules as means of defence