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Animal Diversity
What is an Animal?
• Animal Characteristics– Eukaryotic– Multicellular– Heterotrophic– Lack cell walls
• Unique combination
Other Interesting Features
• Internal digestion (digestive tract)
• Life cycle– Diploid adults produce haploid gametes– Some develop directly to adult form– some go through a larval (immature) stage
• Metamorphosis = change in body from larva to adult
Evolution of Animal Life
Phylum Porifera
• Add sponge diagram & pics
Radial Symmetry
Phylum Cnidaria
Cnidocytes
Bilateral Symmetry
Phylum Platyhelmenthes
Body Cavities - Acoelomate
Body Cavities - Pseudocoelomate
Body Cavities - Coelomate
Phylum Nematoda
Phylum Moluska
Mollusk Key Features
Segmentation
Phylum Annelida
Phylum Arthropoda
Arthropod Body Plan
Phylum Echinodermata
Phylum Chordata
Vertebrates
First VertebratesAgnathans (jawless fishes)
Lampreys & hagfish
Evolution of Jaws
Fish
• Most successful & diverse group of vertebrates– ~30,800 living species– Amphibians evolved from them
• Key characteristics– Gills– Vertebral column– Single loop circulatory system– Nutritional deficiencies
Fish
Evolution of Amphibians
Amphibians
Anura Urodella
Evolution of Amniotes
Extant Reptiles
Evolution of Birds from Reptiles
Extant Birds
Mammalia