WARM UP 1. List 5 characteristics that all animals share. 2. List 10 types of animals.

Animal Characteristics

General Characteristics  Multicellular eukaryotes  Support Endoskeleton Exoskeleton

General Characteristics  Can move  Heterotrophs Filter or hunt

General Characteristics  Digestion In cells or organs  Reproduction Internal or external fertilization Sperm + egg = zygote

Development  Zygote  embryo  Embryo  blastula Many cells

Development  Blastula  gastrula 3 tissue layers  Endoderm  Digestive system  Mesoderm  Muscles, lungs, etc.  Ectoderm  Skin, nerves

Classifying Animals  Body Cavities Coelomates: True body cavity Pseudocoelomates: Unlined cavity Acoelomates: No cavity

Classifying Animals  Body Plans Bilateral symmetry  Two halves Radial symmetry  Central point Asymmetry  Irregular

Animal Types Ch

Classifying Animals  Wide variety 9 phyla

Sponges  Asymmetry  Sessile, filter feeders  Shallow oceans

Cnidarians  Radial symmetry  Ocean environments  Stinging tentacles  Ex: jellyfish

Flatworms  Some parasites Ex: tapeworms  Some free-living Ex: Planaria

Roundworms  Some parasites  Ex: heartworm

Mollusks  Covered by mantle or shell  Muscular movement  Ex: octopus, snails, oysters

Segmented Worms  Ex: earthworms, leeches

Arthropods  Bilateral symmetry  Have exoskeleton  Largest group – over 50% of all animals  Ex: insects, lobsters, spiders

Echinoderms  Radial symmetry  Hard outer covering  Ex: sea stars

Vertebrates  Bilateral symmetry  Internal skeleton  Ex: fish, mammals