Animal Kingdom 1

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Author:
lgunnels
ID:
111169
Filename:
Animal Kingdom 1
Updated:
2011-10-22 19:10:12
Tags:
BioTest3
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Description:
Evolutionary Trends in the Animal Kingdom
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  1. LEVEL of ORGANIZATION: (Cellular, Tissue, Organ)
    • - Porifera (Cellular Level)
    • - Cnidaria & Ctenophora (Tissue Level)
    • - Platyhelminthes = Chordata (Organ Level)
  2. SYMMETRY: (Asymmetry, Radial Symmetry, Bilateral Symmetry)
    • - Porifera (Asymmetry)
    • - Cnidaria & Ctenphora (Radial Symmetry)
    • - Platyhelminthes = Chordata (Bilateral Symmetry)

    Note: Echinodermata = bilateral-symmetrical as larvae, radially-symmetrical as adults

    Bilateral Symmetry:

  3. NUMBER of TISSUE LAYERS in the BODY WALL: (Diploblastic, Triploblastic)
    • - Porifera (N/A)
    • - Cnidaria & Ctenophora (Diploblastic)
    • - Platyhelminthes = Chordata (Triploblastic)
  4. BODY PLAN: (Acoelmate, Pseudocoelomate, Eucoelomate) "Organism must be Triploblastic"
    • - Porifera, Cnidaria & Ctenophora (N/A)
    • - Platyhelminthes & Nemertea (Acoelomate)
    • - Nematoda & Rotifera (Pseudocoelomate)
    • - Mollusca = Chordata (Eucoelomate)
  5. DEVELOPMENT: (Protostome, Deuterostome) "Organism must be a Eucoelmate"
    • - Porifera = Rotifera (N/A)
    • - Mollusca = Arthropoda (Protostomes; "Schizocoelomates")
    • - Lophophorates, Echinoderms & Chordates (Deuterostomes; Enterocoelomates")

    See paper notes for more info
  6. DIGESTIVE TRACT: (Incomplete, Complete)
    • - Porifera (N/A)
    • - Cnidaria = Platyhelminthes (Incomplete = "Gastrovascular Cavity")
    • - Nemertea = Chordata (Complete = "Alimentary Canal")

    Note: Cestodes (Tapeworms) do not have a digestive tract

  7. VERTEBRATE or INVERTEBRATE:
    • - Portifera = Cephalochordata (Invertebrate)
    • - Vertebrata (Vertebrates)
  8. Blastopore
    • - Gametes
    • - Zygote
    • - 16-cell stage, "morula" = "solid ball stage"
    • - "Blastulas" stage = "hollow ball" stage
    • - "Gastrula" stage
    • - Blastopore (Ectoderm, Meoderm, Endoderm, Archenteron "primative gut")
  9. Circulatory System
    • - Open = Artery, Hemocoel, Vien
    • - Closed = Artery, Arterioles, Capilaries, Venule, Veins


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