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KINGDOM ANIMALIA. Fun stuff!!. ANIMALIA : 9 MAIN PHYLA. Porifera Cnidaria Platyhelminths Nematoda Annelida Mollusca Arthropoda Echinodermata Chordata. 3 GERM OR CELL LAYERS. Ectoderm – outer layer cover Mesoderm – Muscle & organ layer Endoderm – Digestive tract.

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kingdom animalia

KINGDOM ANIMALIA

Fun stuff!!

animalia 9 main phyla
ANIMALIA : 9 MAIN PHYLA
  • Porifera
  • Cnidaria
  • Platyhelminths
  • Nematoda
  • Annelida
  • Mollusca
  • Arthropoda
  • Echinodermata
  • Chordata
3 germ or cell layers
3 GERM OR CELL LAYERS
  • Ectoderm – outer layer cover
  • Mesoderm – Muscle & organ layer
  • Endoderm – Digestive tract
phylum porifera
PHYLUM PORIFERA
  • Sponges
  • Simple creatures
  • Marine & fresh water
  • No true tissues, so no organs
  • No specialized cellular function
  • Most are Hermaphroditic - perform female & male functions
  • Can reproduce sexually or asexually
  • Sessile – do not move
  • Suspension feeders
  • If you cut a sponge, it will spontaneously reaggregate back into a sponges
porifera physiology
PORIFERA PHYSIOLOGY
  • Water flows into the sponge through Porocytes, entering a cavity called Spongocoel
  • The spongocoel is lined with feeding cells called choanocytes
    • Choanocytes beat their flagella to create a current that draws water into the porocytes
  • Ameobocytes – transfer nutrients to other cells of the sponge’s body
cnidaria
CNIDARIA
  • Eumetazoans
  • Jellyfish & Corals
  • Radial Symmetry
  • Lack Mesoderm
  • 2 Body arrangements:
    • Polyp – Asexual, cylinder-shaped, & Attached
    • Medusa – Sexual, flat, and Roams for food
  • Use tentacles to capture & eat prey
questions
QUESTIONS
  • Are Cnidarians protosomes or deuterosomes?
  • How do sponges feed?
  • What are Choanocytes & what is their function?
platyhelminths
PLATYHELMINTHS
  • Flatworms
  • Acoelomates
  • Protosomes
  • Bilaterally symmetrical
  • Some Cephalization – Formation of head structure
  • 3 Important forms
    • Flukes – Parasitic & alternate between asex & sex reprod.
    • Planarians – Free-living carnivores in fresh water
    • Tapeworms – Parasitic flatworms that tend to live in vertebrates, like humans!!
rotifera
ROTIFERA
  • Pseudocoelomates
  • Bilateral Symmetry
  • Separate mouth & anus
  • Microscopic
  • True digestive canal
nematoda
NEMATODA
  • Roundworms
  • Protosomes
  • Pseudocoelomates
  • Bilaterally Symmetric
  • Some cause Trichinosis
    • GI illness due to tainted pork
mollusca
MOLLUSCA
  • Snails, slugs, octopus, & squid
  • Protosomes
  • Coelomates – full digestive systems
  • Soft body with calcium-containing shell
  • Bilateral symmetry
  • Bivalves – Clams and Oysters
    • Have hinged shells that are divided into 2 parts
annelida
ANNELIDA
  • Segmented Worm
  • Earthworms & Leaches
  • Protosome, Bilaterally Symmetrical, Coelomates
  • Digestive tract is tube-within-a-tube
  • Hermaphroditic
  • Blood with hemoglobin
  • Closed circulatory system
  • Gas diffusion across skin
  • Nephridia used for excretion – precursor to kidneys
arthropoda
ARTHROPODA
  • Protosome Coelomate
  • Jointed Appendages
  • Segmented: head, thorax, & abdomen
  • Chitinous exoskeleton
  • May have a larval stage
  • Open circulatory system
  • Malphigian tubules – removes nitrogenous waste
  • Trachea – air ducts, bring air in from the environment
  • Some have book lungs or gills
echinodermata
ECHINODERMATA
  • Sea stars
  • Deuterosome coelomates
  • Sessile or slow moving
  • Bilateral symmetry as embryo, but reverts to primitive form of symmetry (radial) as an adult
  • Water Vascular system
  • Sexual Reproduction – External fertilization
  • Asexual Reproduction – fragmentation & regeneration
  • Calcium based endoskeleton
chordata
CHORDATA
  • Deuterosome coelomates
  • Invertebrates & Vertebrates
    • Vertebrates – possessing backbone
  • Dorsal Hollow Nerve Cord – forms the nervous system & becomes the Brain & spinal cord
  • Notochord – Long support rod that is replaced by bone in vertebrates
  • Pharyngeal Gill slits – functions in breathing or feeding
  • Tail – Lost in many animals by birth
chordates
CHORDATES
  • Can be homeothermic (homo – same) or poikilothermic
    • Homeothermic – maintains consistent body temperature
      • Birds & Mammals
    • Poikilothermic – Cold blooded, attain heat from external environment
      • Iguanas and cold environment
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