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Major Animal Phyla

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Major Animal Phyla Biology 103 Animal Lab Phylum Porifera Sponges Asymmetrical or Radial symmetry No organs Most are Marine Sessile filter-feeders Asexual ... – PowerPoint PPT presentation

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Title: Major Animal Phyla


1
Major Animal Phyla
  • Biology 103 Animal Lab

2
Phylum Porifera
  • Sponges
  • Asymmetrical or Radial symmetry
  • No organs
  • Most are Marine
  • Sessile filter-feeders
  • Asexual Reproduction
  • Fragmentation
  • Sexual Reproduction
  • Hermaphrodites

3
Phylum Cnidaria
  • Cnidarians
  • Ex. Hydra, Jellyfish, corals, sea anemone
  • Radial symmetry
  • Mostly Marine
  • Have Nerve Cells
  • Nematocysts stinging tentacles
  • 2 Body Forms
  • Polyp
  • Medusa

Polyp
Medusa
4
Phylum Platyhelminthes
  • Flatworms
  • Bilateral Symmetry
  • Definite Head
  • Thin, solid body
  • Excretory and Digestive System
  • Oxygen by diffusion
  • Hermaphrodites
  • Ex. Planaria, flukes, tapeworms

5
Phylum Nemotoda
  • Roundworms
  • Bilateral symmetry
  • Tough outer covering
  • 2 openings
  • Tube-like digestive system
  • Separate sexes
  • Ex. Nematodes, hookworms, pinworms

6
Phylum Mollusca
  • Bilateral symmetry
  • Mostly Marine
  • 3 body parts foot, visceral mass, mantle
  • Have heart digestive, excretory, and open
    circulatory systems gills
  • Mostly separate sexes
  • Ex. Snails(gastropods), slugs, squid(cephalopods),
    octopus, clams(bivalves), oysters

7
Phylum Annelida
  • Segmented worms
  • Aquatic and terrestrial
  • 2 body openings
  • Have nervous, digestive, excretory, and closed
    circulatory systems head, nephridia
  • Ex. Earthworms, leeches, nereis

8
Phylum Arthropoda
  • Jointed appendages
  • Bilateral symmetry
  • Exoskeleton
  • Separate sexes internal fertilization in most
  • Most diverse phyla
  • 4 classes (next 4 slides)

9
Arachnids
  • 2 body sections
  • 2 pairs of mouth parts (chelicerae)
  • 8 legs
  • Ex. Spiders, ticks, mites, scorpions

10
Crustaceans
  • 2 pair of antennae
  • Aquatic except for pill bug
  • Ex. Crabs, lobster, barnacles, shrimp

11
Myriapods
  • Many legs
  • Ex. Millipedes Centipedes

12
Insects
  • 6 legs
  • 3 body sections
  • Ex. Grasshopper, bee, butterfly

13
Phylum Echinodermata
  • Spiny skin
  • Bilateral symmetry as larvae
  • Radial Symmetry as adult
  • Separate sexes
  • Endoskeleton
  • Marine
  • Ex. Starfish, sea urchins, sand dollars

14
Phylum Chordata (vertebrates)
  • Notochord (nerve cord)
  • No vertebrae
  • Gill slits
  • Ex. Sea squirts, lancelets

15
Phylum Chordata (Vertebrates)
  • Have backbone (vertebrae)
  • Dorsal nerve cord
  • Bilateral symmetry
  • Closed circulatory system
  • Brain
  • 7 classes (next 5 slides)

16
Fish
  • Class Agnatha Jawless fish
  • Class Chondrichthyes Cartilaginous fish
    (sharks, rays)
  • Class Osteichthyes Bony fish

17
Class Amphibia
  • Amphibians
  • Must return to water to reproduce
  • Aquatic larvae
  • Semi-terrestrial adult
  • Moist habitat
  • Ex. Frogs, salamanders

18
Class Reptilia
  • Reptiles
  • Dry, scaly skin
  • 3-chambered heart
  • Lays amniotic egg on land
  • Ectotherms (body temp. depends on environment
  • Ex. Lizards, snakes, turtles

19
Class Aves
  • Birds
  • Endotherms (Internal body heat)
  • Feathers
  • Hollow bones
  • 4-chambered heart

20
Class Mammalia
  • Mammals
  • Endotherms
  • Hair
  • Milk produced in mammary glands
  • Nurse young
  • 4-chambered heart
  • Live birth for most mammals
  • Highly developed brains
  • Ex. Mice, Whales, Humans
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