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Sponges and Cnidarians

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  1. Sponges and Cnidarians

  2. Sponges

  3. Sponges Intro. • Origin • Evolution • Collar cells • Uses of collar cells

  4. Sponges Intro, cont. • Diversity • Species # • Variety

  5. Characteristics of Sponges • Kingdom • Phylum • They are mostly • # of cells • Body contains

  6. Characteristics of Sponges • Symmetry • Interior surface • Choanocyte

  7. Choanocyte • Beating • Create • Capture

  8. Choanocyte • Collar is made of • Why?

  9. Choanocyte • The food particles then • How?

  10. Food and Oxygen Exchange • Efficient? Non-efficient? • Why? • Lots of collar cells working together

  11. Structure of a Sponge • Made of? • Spicules – • Spongin –

  12. Spicules

  13. Spongin Fun fact: When you wash with natural sponges, this is the portion you wash/exfoliate with!

  14. Spicules & Spongin

  15. Characteristics of Sponges • Reproduce asexually • By? 2 months • Larva • Adults Sponge Love Scene #1 Sponge Love Scene #2 Sexual Budding

  16. Gemmule

  17. Three Main Body Types 1. Asconoid • Def • Characteristics

  18. Three Main Body Types 2. Syconoid • Def • Characteristics

  19. Three Main Body Types 3. Leuconoid • Def • Characteristics

  20. Classification of Sponges • Kingdom: • Phylum: • Class Calcarea • Class Hexactinellida • Class Demospongiae

  21. Class Calcarea • Spicules • Made of • Shape • Body types?

  22. Class Hexactinellida • Spicules • Made of? • Description • Body types? • Often called?

  23. Class Hexactinellida

  24. Class Demospongiae • Spicules • Made of • Description • Body types? • Other characteristics

  25. Class Demospongiae

  26. Cnidarians

  27. Characteristics of Cnidarians • Kingdom • Phylum • Examples: • Where do they live???

  28. Characteristics of Cnidarians • Symmetry • Head region? • Two basic types: • Name, def, examples • Name, def, examples

  29. Polyp Form • Polyp – • Lifestyle of polyps? • Body shape? • Mouth

  30. Medusa Form • Medusa – • Lifestyle? • Body shape? • Mouth

  31. Life Cycle • Body forms? • Reproduction • Polyp • Medusa

  32. Life Cycle

  33. Characteristics of Cnidarians • Two layered body • Epidermis – • Def • Derived from? • Gastrodermis – • Def • Derived from? • Lines the • Main function

  34. Characteristics of Cnidarians

  35. Characteristics of Cnidarians • Tentacles contain • Function • Characteristics • Nematocyst

  36. Nematocyst • Stinging cells • Contain • When do they uncoil? • Contain

  37. Nematocysts Nematocyst Firing

  38. Four Classes of Cnidarians • Class Hydrozoa • Class Scyphozoa • Class Cubozoa • Class Anthozoa

  39. Class Hydrozoa • Solitary • Colonial • Reproduce? • Where do they live? • Examples:

  40. Hydra

  41. Obilia Medusa Polyp

  42. Physalia

  43. Class Scyphozoa • Movement • Body form • Where do they live? • Organs? • Examples:

  44. Aurelia

  45. Cassiopeia

  46. Class Cubozoa • Movement • Body form • Where do they live? • Characteristics? • Examples: