1 / 24

DO NOW

Discover the characteristics of animals, body structures, symmetry types, and major animal groups in this engaging science class activity.

valeriemiller
Download Presentation

DO NOW

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DO NOW • Juniors – tell Mrs. Strickhart what you are taking for science next year

  2. What is an Animal?

  3. Questions! • 1. What are the characteristics of animals? • 2. How do protostomes differ from deuterstomes? • What is the ancestral protistan of animals? • What are the two major groups based on “tissues”? • What are the two types of symmetry?

  4. More things to write! • Describe the three types of body cavities. • Describe a blastula. • Describe a Blasopore • What are Lophotrochozoans? • What are Ecdysozans?

  5. Animal Characteristics • ingestion – eating other organisms or decomposed material • cell structure – lack of cell wall, form collagen in the ECM, tight junctions, desmosomes, gap junctions • unique tissues – muscle and nervous tissues for movement

  6. Parazoa - Eumetazoa • Parazoa – no tissues • Eumetazoa – true tissues

  7. Radiata - Bilateria • Radially symmetrical

  8. Bilateral • Bilateral Symmetry • If split in two, two mirror images result • Cephalization - nerves and sensory organs concentrated toward the head end – evolved to help organisms locate food

  9. Acoelomate, Pseudocoelomate, and Coelomate • A = without a body cavity • Pseudo = false body cavity, not completely lined • Coelomate = body cavity lined, fluid filled

  10. Nematodes are commonly called roundworms. They have a body cavity that does not have a lining. The cavity is referred to as a pseudocoel. Pseudocoleomate

  11. The blastula is a hollow ball of cells that forms in early embryonic development.

  12. Some cells migrate upward into the blastula to form a blastopore. This opening eventually forms the mouth of animals called protostomes. If the opening does not form the mouth, but instead forms the anus, the animals are deuterostomes.

  13. Deuterstome vs Protostome

  14. Do It NOW!!!! Quiz Today you will be dissecting two invertebrates and earthworm and a grasshopper. Using your animal clad, answer the following. • Are these two animals Parazoans or Eumetazoans? What does that mean? • Are these two animals part of Radiata or Bilateria? What does that mean? • Are these animals Protostomes or Deuterostomes? What does that mean? • Which animal is a Lophotrochozoan? What does that mean? • Which animal is a Ectyzoan? What does that mean?

  15. Do It NOW!!!! Quiz Today you will be dissecting two invertebrates and earthworm and a grasshopper. Using your animal clad, answer the following. • Are these two animals Parazoans or Eumetazoans? What does that mean? • Are these two animals part of Radiata or Bilateria? What does that mean? • Are these animals Protostomes or Deuterostomes? What does that mean? • Which animal is a Lophotrochozoan? What does that mean? • Which animal is a Ectyzoan? What does that mean?

  16. The Lophotrochozoa comprise one of the major groups within the animal kingdom, In turn, the Lophotrochozoa belongs to a larger group within the Animalia called the Bilateria, because they are bilaterally symmetrical with a left and a right side to their bodies.

  17. Lophotrochozoans • Grouped together because of the molecular evidence • Trocho = development of trochophore larvae • Lophophore = horseshoe shaped crown of ciliated tentacles

  18. Ecdysozoa • Separated into the clad via molecular data • Morphologically – produce exoskeletons therefore growth must occur via molting

More Related