Advanced Invertebrates Circulation Support, Growth & Movement Nervous Systems (cont’d)
Circulation <ul><li>mollusks </li></ul><ul><ul><li>bivalves and gastropods – open w/ hemolymph & heart </li></ul></ul><ul>...
Support, Growth & Movement <ul><li>mollusks </li></ul><ul><ul><li>Gastropods </li></ul></ul><ul><ul><ul><li>have 1 shell <...
Support, Growth & Movement <ul><li>mollusks </li></ul><ul><ul><li>Cephalopods </li></ul></ul><ul><ul><ul><li>jet propulsio...
Support, Growth & Movement <ul><li>annelida </li></ul><ul><ul><li>longitudinal muscles  </li></ul></ul><ul><ul><li>circula...
Support, Growth & Movement <ul><li>arthropods </li></ul><ul><ul><li>molt to grow larger – shed exoskeleton </li></ul></ul>...
Support, Growth & Movement <ul><li>echinodermata </li></ul><ul><ul><li>metamorphosis from bilaterally symmetrical larvae c...
Neural Control & Sensory Organs <ul><li>annelids </li></ul><ul><ul><li>chain of ganglia </li></ul></ul><ul><ul><li>ventral...
Neural Control & Sensory Organs <ul><li>arthropods </li></ul><ul><ul><li>crustaceans </li></ul></ul><ul><ul><ul><li>paired...
Neural Control & Sensory Organs <ul><li>echinodermata  </li></ul><ul><ul><li>nerve ring </li></ul></ul><ul><ul><li>radial ...
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Advanced Invertebrates Csn

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Advanced Invertebrates Csn

  1. 1. Advanced Invertebrates Circulation Support, Growth & Movement Nervous Systems (cont’d)
  2. 2. Circulation <ul><li>mollusks </li></ul><ul><ul><li>bivalves and gastropods – open w/ hemolymph & heart </li></ul></ul><ul><ul><li>cephalopods – closed w/ heart </li></ul></ul><ul><li>annelids – closed w/ aortic arches </li></ul><ul><li>arthropods </li></ul><ul><ul><li>crustaceans – open </li></ul></ul><ul><ul><li>chelicerates – open </li></ul></ul><ul><ul><li>uniramians – open w/ heart & aorta </li></ul></ul><ul><li>echinoderms – cellular diffusion </li></ul>
  3. 3. Support, Growth & Movement <ul><li>mollusks </li></ul><ul><ul><li>Gastropods </li></ul></ul><ul><ul><ul><li>have 1 shell </li></ul></ul></ul><ul><ul><ul><li>exhibit torsion </li></ul></ul></ul><ul><ul><ul><li>move w/ wavelike contractions of foot </li></ul></ul></ul><ul><ul><li>Bivalves </li></ul></ul><ul><ul><ul><li>have 2 shells </li></ul></ul></ul><ul><ul><ul><li>move with “hatchet foot” extruded from body </li></ul></ul></ul>
  4. 4. Support, Growth & Movement <ul><li>mollusks </li></ul><ul><ul><li>Cephalopods </li></ul></ul><ul><ul><ul><li>jet propulsion </li></ul></ul></ul><ul><ul><ul><li>stabilize with fins sometimes </li></ul></ul></ul><ul><ul><ul><li>can crawl </li></ul></ul></ul><ul><ul><ul><li>very malleable body </li></ul></ul></ul>
  5. 5. Support, Growth & Movement <ul><li>annelida </li></ul><ul><ul><li>longitudinal muscles </li></ul></ul><ul><ul><li>circular muscles </li></ul></ul><ul><ul><li>parapodia – stumpy leg-like appendages </li></ul></ul><ul><ul><li>setae – bristle like hairs </li></ul></ul>
  6. 6. Support, Growth & Movement <ul><li>arthropods </li></ul><ul><ul><li>molt to grow larger – shed exoskeleton </li></ul></ul><ul><ul><li>unprotected until new exoskeleton hardens </li></ul></ul><ul><ul><li>many muscles </li></ul></ul><ul><ul><li>jointed appendages allow full range of motion </li></ul></ul>
  7. 7. Support, Growth & Movement <ul><li>echinodermata </li></ul><ul><ul><li>metamorphosis from bilaterally symmetrical larvae called bipinnaria to radially symmetrical adult </li></ul></ul><ul><ul><li>movement with a water vascular system </li></ul></ul>
  8. 8. Neural Control & Sensory Organs <ul><li>annelids </li></ul><ul><ul><li>chain of ganglia </li></ul></ul><ul><ul><li>ventral nerve cord connects ganglia in each segment </li></ul></ul><ul><ul><li>setae </li></ul></ul>
  9. 9. Neural Control & Sensory Organs <ul><li>arthropods </li></ul><ul><ul><li>crustaceans </li></ul></ul><ul><ul><ul><li>paired ganglia </li></ul></ul></ul><ul><ul><ul><li>pair of branched antenna & pair of antennules, sensory hairs </li></ul></ul></ul><ul><ul><ul><li>compound eyes on stalks </li></ul></ul></ul><ul><ul><li>chelicerates </li></ul></ul><ul><ul><ul><li>brain </li></ul></ul></ul><ul><ul><ul><li>simple eyes: usually three or more </li></ul></ul></ul><ul><ul><li>uniramians </li></ul></ul><ul><ul><ul><li>brain & ventral nerve cord </li></ul></ul></ul><ul><ul><ul><li>paired ganglia in each segment </li></ul></ul></ul><ul><ul><ul><li>antenna & sensory hairs </li></ul></ul></ul><ul><ul><ul><li>simple & compound eyes </li></ul></ul></ul><ul><ul><ul><li>tympanum: sound sensing </li></ul></ul></ul>
  10. 10. Neural Control & Sensory Organs <ul><li>echinodermata </li></ul><ul><ul><li>nerve ring </li></ul></ul><ul><ul><li>radial nerves </li></ul></ul>
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