1 / 12

Animal Kingdom

Animal Kingdom. Characteristics. Heterotrophic, multicellular , eukaryotes Mobile (most) Require oxygen for cellular respiration. Evolutionary Past. Common ancestor (700 million yrs ago) colonial, flagellated, protist

holden
Télécharger la présentation

Animal Kingdom

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. Animal Kingdom

  2. Characteristics • Heterotrophic, multicellular, eukaryotes • Mobile (most) • Require oxygen for cellular respiration

  3. Evolutionary Past • Common ancestor (700 million yrs ago) • colonial, flagellated, protist • Cell folded in on itself creating a digestive cavity and giving rise to first animal

  4. Nerve cells develop separating sponges (Porifra) from the rest of the animal phyla

  5. Radial symmetry separates the Cnidaria phyla from the rest which exhibit bilateral symmetry

  6. Other phyla separated by similarities in embryonic development • protostomes (invertebrates) • deuterostomes (vertebrates [chrodata]; and echinodermata b/c of similar embryonic development)

  7. Protostomes include: • Platyhelminthes (flatworms) • Rotifera (rotifers) • Mollusca (molluscs) • Annelida (segmented worms) • Nemtoada (round worms) • Arthropoda (insects, jointed limbs)

  8. Cell Specialization • Stem cells (undifferentiated cells) are able to develop into all the specific types of cells (differentiated cells) found in an organism. • Tissues are groups of differentiated cells acting together

  9. Distinguishing Phyla • Germ layer similarites • 3 embryonic germ layers: • Ectoderm (outer layer) • Mesoderm (middle layer) • Endoderm (inner layer) • Not all phyla have all layers • Ex. Cnidera do not have a mesoderm

  10. Ectoderm develops into: • Shells, scales, feathers, hair, nails Mesoderm develops into: • Circulatory, reproductive, excretory, muscular systems, and body cavity Endoderm develops into: • Inner lining of gut and respiratory system

  11. Distinguishing Phyla • Presence of a body cavity (coelum) or not • Ex. Flatworms (Platyhelminthes) do not have a coelum

  12. HWK • Read pg 96-99 • Questions #1,3,4,5

More Related