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Animal Characteristics

Animal Characteristics. Multicellular, heterotrophic eukaryotes No cell walls Nervous & muscle tissue present in most Sexual reproduction, diploid life cycle is dominant All have similar developmental stages. Our Ancestor. Sessile, her maphroditic, regenration. mesoderm. Ectoderm.

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Animal Characteristics

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  1. Animal Characteristics • Multicellular, heterotrophic eukaryotes • No cell walls • Nervous & muscle tissue present in most • Sexual reproduction, diploid life cycle is dominant • All have similar developmental stages

  2. Our Ancestor

  3. Sessile, her maphroditic, regenration mesoderm Ectoderm

  4. Porifera • No true tissues • Choanocytes • Amoebacytes • Sessile • Reproduction

  5. Cnidaria • Jellyfish,hydra • Gastrovascular cavity • Nerve net • cnidocytes • Medusa/polyp

  6. Platyhelminthes-flatworms Planarians, tapeworms Protonephridia Clear CNS Eye spots Nematoda Roundworms Trichinella C.elegans

  7. Mollusca • Gastropoda, bivalvia • Radula • Muscular foot, visceral mass, mantle • Complete dig., open circulatory • Cephalopoda(squid) • Closed circ., well developed senses, intelligent

  8. Annelida • Segmented worms • Closed circ., complete dig. • Metanephridia(excretion)

  9. Arthropoda • Insecta(terrestrial), crustacea(marine) • Exoskeleton, molting, compound eyes, • Malphigian tubules • Spiracle/tracheae

  10. Echinoderms • Seastars • Tube feet • Water vascular system • Deuterostomes • Radial symmetry • Nerve nets

  11. Chordata • Notohord-precursor to vertebrae

  12. Subphylum-vertebrates • All have • Vertebral column • Closed circulation • cephalization

  13. Chondrichthyes • Osteichthyes • Amphibia • Reptile • Aves(birds)

  14. mammals • Characteristics • Mammary glands (milk) • Hair • Endothermic • Well developed respiratory & circulatory systems • Internal fertilization • Monotremes(egg laying) • Marsupials(pouches) • Placental

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