Transcript Animal Kingdom Invertebrates - Parkway C-2

Animal Kingdom
Invertebrates
Tour of the Invertebrate Organisms of
the Animal Kingdom
Invertebrates Are Animals
• Animal Characteristics
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Eukaryotic
Heterotrophic
Multicellular, specialized cells
Lack Cell Walls
Reproduce, sexual and asexual
Respond to environment
Motile, muscles
Specifics to Invertebrates
• Characterized by No Backbone!
Other means of structure
• Exoskeleton, Spicules, Shells, Pin, Hydrostatics
• Invertebrate Fun Facts
• 95% of all animal species
• Sizes range from microscopic to 20 meters
Classifying Invertebrates
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Body Symmetry
Cephalization Level
Body Plan
Layers of Tissue
• Early Development – Protostome or Deuterostome
Major Groups
• Crustacea
• Platyhelminthes
• Annelida
• Porifera
• Cnidaria
• Insecta
• Mollusca
• Nematoda
• Echinodermata
http://school.discovery.com/clipart/ , http://clipart.usscouts.org
Things to Consider
• Level of Classification
– Phylum or Class
• Common name
examples for each
– sea star
• Type of Symmetry
– bilateral
• Type of Body Plan
– acoelomate, coelomate
• Development of
systems
– Circulatory
• Movement
Invert Tour
Title-Invert Tour- Animals without a backbone. They share the LACK of a trait.
Purpose- Observe and gather information to compare/contrast Invert groups.
Observations and NotesClass or
Phylum
name
ExamplesCommon
names
Type of
symmetry
Type of
Body plan
systems
Major characteristics
Rank
Conclusion-Reference chapters 26-29 Dragonfly
1. Which invert groups do you believe are the LEAST complex?
WHY?
2. Which invert groups do you believe are the MOST complex?
WHY?
3. List your evolutionary ranking from LEAST to MOST
complex.
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4. How does YOUR RANKING compare to the BOOK model?
(pgs 747-749) Explain in detail your ranking differences and
similarities.
Class or
Phylum name
ExamplesCommon
names
Type of
symmetry
Type of Body
plan
systems
R
an
k
Class
bilateral
coelomate
Open circ.- heart, brain
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Crustacea
Shrimp, crabs,
lobsters,
barnacles
Phylum
Platyhelminthes
Flukes
tapeworms
bilateral
acoelomate
Diffusion- resp, excre, circ, single opening
for digestion, cephalization
3
Phylum
bilateral
coelomate
Closed circ system, nephridia-waste, brain,
primitive heart
5
Annelida
Earthworms
leeches
Phylum
Tube Sponge
asymmetry
acoelomate
Sessile, no tissues or organ systems
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Porifera
Dead Man’s Fingers
Phylum
Jellyfish
corals, hydra
radial
acoelomate
Stinging cells in tentacles, gastrovascular
cavity, diff. for resp, circ, excre -nerve net
2
Bees,
butterflies,
beetles, ants
bilateral
coelomate
Open circ- heart, struct for resp- tracheal
tubes, brain
5
Snails, octopi,
squid, clams
bilateral
coelomate
Soft-body- internal or external shell,
aquatic-gills, snails/clams- open circ.
Squid/oct closed circ, small ganglia to brains
5
bilateral
pseudocoelmat
e
Digestive sys- two openings
4
Nematoda
C. Elegans
Ascaris
Phylum
Echinodermata
Sea stars, sea
urchins, sand
radial
coelomate
Endoskeleton, water-vas, sys- resp, circ,
movement tube feet nerve ring/ nerves
Cnidaria
Class
Insecta
Phylum
Mollusca
Phylum
Struct for resp- gills or book gills,
H2O movement allows – circ. resp, excretion,
feeding
Diffusion- resp, excre, circ
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