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BIOL 197L – Lab #7: INVERTEBRATE DIVERSITY AND ANATOMY I

BIOL 197L – Lab #7: INVERTEBRATE DIVERSITY AND ANATOMY I. Which phyla did we study in class? And what genera represented these phyla?. Cnidaria Hydra sp. Platyhelminthe Dugesia sp. Mollusca Venus sp. Annelida Lumbricus sp.

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BIOL 197L – Lab #7: INVERTEBRATE DIVERSITY AND ANATOMY I

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  1. BIOL 197L – Lab #7: INVERTEBRATE DIVERSITY AND ANATOMY I

  2. Which phyla did we study in class?And what genera represented these phyla?

  3. CnidariaHydra sp.

  4. PlatyhelmintheDugesia sp.

  5. MolluscaVenus sp.

  6. AnnelidaLumbricus sp.

  7. What phylum does this organism belong to?What genus does this organism belong to?Which life form is represented here?What is the other life form?

  8. CnidariaHydraPolyp (sedentary)Medusa (free-swimming)

  9. Other types of organisms that represent the phylum Cnidaria: • Jellyfish • Sea anemones • Corals • Hydrozoans

  10. What symmetry do cnidarians show?

  11. Radial symmetry

  12. What type of body plan do cnidarians show?

  13. Diploblasty • Two germ layers: • Ectoderm • Endoerm

  14. What internal space acts as the central digestive cavity?

  15. Gastrovascular cavityIs the gastrovascular cavity a complete or an incomplete gut?

  16. The gastrovascular cavity is an incomplete (or blind) gut

  17. Identify:

  18. Gastrovascular cavity

  19. Identify:

  20. TentaclesWhat are the stinging cells of the tentacles called?

  21. Nematocysts • Used to paralyze and entangle prey • The tentacles push food through the mouth opening

  22. Identify:

  23. Mouth

  24. How do members of the genus Hydra reproduce?

  25. Asexually and sexually (hermaphroditic)What is the asexual method called?

  26. BuddingNote that budding occurs from the gastrovascular cavity

  27. Identify:TissueWhat germ layer is it derived from?

  28. EpidermisDerived from ectoderm

  29. Identify:TissueWhat germ layer is it derived from?

  30. GastrodermisDerived from endoderm

  31. What acellular substance joins the tissue tissues?

  32. Mesoglea

  33. Is this Hydra a male or female?What is the structure that produces this type of gamete called?

  34. Male (note the multiple spermaries)Testes (spermaries)

  35. Is this Hydra a male or female?What is the structure that produces this type of gamete called?

  36. Female (note that only one ovary is present – as opposed to multiple spermaries in males)Ovary

  37. Identify:

  38. Identify: Tentacles (The outer layer)

  39. Identify: Tentacles Epidermis The middle layer

  40. Identify: Tentacles Epidermis Mesoglea

  41. Identify: Tentacles Epidermis Mesoglea Flagellum

  42. Identify: Tentacles Mouth Epidermis Mesoglea The inner layer Flagellum

  43. Identify: Tentacles Mouth Epidermis Mesoglea Gastrodemis Flagellum

  44. Identify: Tentacles Mouth Epidermis Mesoglea Gastrodemis Gastrovascular Cavity Flagellum

  45. Identify:

  46. Identify: Tentacles (Containing nematocysts)

  47. Identify: Tentacles (Containing nematocysts) Mouth

  48. Identify: Tentacles (Containing nematocysts) Mouth Asexual bud

  49. What phylum does this organism belong to?What genus does this organism belong to?

  50. PlatyhelmintheDegusia sp. • Free-living flatworms • AKA planarians

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