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Animal Phyla

Animal Phyla. Simple invertebrates, Protostomes , and Deuterostomes. Simple Invertebrates. Ex. Sea sponges. Simple Invertebrates. Porifera (“pores”) No nerves Flagellated cells create flow of water (with food particles that are taken in by cells) ~ in through pores, out through top

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Animal Phyla

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  1. Animal Phyla Simple invertebrates, Protostomes, and Deuterostomes

  2. Simple Invertebrates

  3. Ex. Sea sponges Simple Invertebrates • Porifera (“pores”) • No nerves • Flagellated cells create flow of water (with food particles that are taken in by cells) ~ in through pores, out through top • Hemaphrodidic • Ciliated larvae are motile until the find a suitable habitat • Adults are sessile

  4. Simple Invertebrates

  5. Ex. Jelly Fish Simple Invertebrates • Cnidaria (“sack like”) • Nerves • Radial symmetry • No mesoderm • Tentacles with stinging cells • Paralyzes predators and prey

  6. Protostome Invertebrates • Platyhelminthes (Flatworms) • Flat, unsegmented worms • Most have single opening digestive cavity (mouth and anus) • No coelom Ex. Tape worm

  7. Ex. Pinworms Protostome Invertebrates • Nemtoada (roundworms) • Unsegmented • Digestive system • tube within a tube • parasitic

  8. Ex. Earth worm Protostome Invertebrates • Anelida (segmented worms) • Segmented • Digestive and circulatory systems • Gas exchange through skin or gills

  9. Protostome Invertebrates • Rotifera (rotifers) • Aquatic • Use cilia to feed

  10. Ex. Mussels Protostome Invertebrates • Mollusca (mollusks) • 3 unsegmented body parts • Foot, visceral mass, mantle (makes shell) • Gills • Digestive and circulatory systems

  11. Protostome Invertebrates • Arthropoda (Jointed legs) • Hard chitin exoskeleton • Gills or internal airways • Segmented body • Jointed appendages • Many systems Ex. Crayfish, spider

  12. Deuterostomes • Echinoderma(“spiny skin”) • Similar embryonic stages to chordata • Bilateral symmetry in youth • Radial symmetry as adults • No head • Nerves circle mouth and extend to arms Ex. Sea urchin, star fish

  13. Deuterostomes • Chordata (“back bone”) • Include: Fish, Amphibians, Mammals, Reptiles and Birds • Most complex organisms – developed systems • Skeleton grows with organism • Most classes are fish! (3 of 7!) • Jawless fish - hagfish • Cartilaginous fish - sharks • Bony fish – tuna • Others: Amphibians - salamandors Reptiles – lizards Birds – eagle Mammals - elephants

  14. Notochord, segmented body, gill slits Bony skeleton True vertebrae, jaws, paired appendages 2 pairs of limbs Waterproof skin and eggs, internal fertilization Feathers Produce milk, hair

  15. HWK • Read pg 100-106 • Questions Pg 107 #6,7,11,12

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