Sponges And Cnidarians
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Sponges And Cnidarians Presentation Transcript

  • 1. Sponges and Cnidarians
  • 2. Sessile
    • Sessile animals are those which are not able to move about. They are usually permanently attached to a solid substrate of some kind, such as a rock, or the hull of a ship in the case of barnacles. Corals lay down their own substrate .
  • 3. Filter Feeder
    • Animals that feed by straining suspended matter and food particles from water. Some animals that use this method of feeding are clams, krill, flamingos, sponges and whale sharks.
  • 4. Collar Cell
    • One of a layer of flagellated cells lining the body cavity of a sponge and characterized by a collar of cytoplasm surrounding the flagellum.
  • 5. Regeneration
    • In biology, an organism is said to regenerate a lost part, if a substitute for the loss grows from the rest of the organism, and the substitute is a copy or almost a copy of the old lost part.
  • 6. Hermaphrodite
    • A hermaphrodite is an animal having both male and female reproductive organs.
    • The two sexes are not separated into distinct male and female types of individual.
  • 7. Larva
    • A larva is a juvenile form of animal with indirect development, undergoing metamorphosis.
  • 8. Cnidarian
    • A phylum of hollow-bodied animals with stinging cells.
  • 9. Tentacle
    • Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates.
  • 10. Polyp
    • a polyp is one of two forms of individuals found in many species of cnidar i ans . The two are the polyp or hydroid and the medusa. Polyps are approximately cylindrical, elongated on the axis of the body.
  • 11. Medusa
    • a medusa is a form of cnidarian in which the body is shortened on its principal axis and broadened, sometimes greatly, in contrast with polyps. Medusae vary from bell-shaped to the shape of a thin disk, scarcely convex above and only slightly concave below.