Crustacea Subphlyum

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By: Trisha Lala …

By: Trisha Lala
Periods 3&4

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  • 1. Why to love the subphylum Crustacea By: Trisha Lala
  • 2. Why are they special?
    • Crustaceans from the subphylum crustacea are a part of the phylum arthropod. They are characterized by their chitinous exoskeleton, motility, and segmented body plans.
  • 3. Where can they be found and what do they need?
    • Humid environments on land
    • Seas and oceans
    • Freshwater
    • Food
    • Water
    • Oxygen
  • 4. What are their favorite activities?
    • Swimming
    • Walking
    • Sexually Reproducing
  • 5. What advancements do they have and what advantage do they get from that?
    • Bilateral symmetry- more controled motility
    • Three germ layers: ectoderm, mesoderm, and endoderm- more complex and effective body systems
    • Coelmate- specialized organ systems are present
    • Cephalization- able to process information
  • 6. What specialized structures do they have?
    • Chitinous exoskeleton- protection
    • Branched limbs- easier motility
    • 1 pair of compound eyes and 2 antenae- advanced sensory perception
  • 7. What is their ideal mate?
    • Same species
    • Good size (no deformaties)
  • 8. What is special about their body systems and behavior?
    • Feeding- small plants and animals
    • Respiration- Diffusion for smaller crustaceans and larger ones use gills
    • Circulation- Open circulatory system with a dorsal heart into which blood flows though paired openings (ostia)
  • 9. Body Systems continued
    • Excretory- Antennal and maxillary gland that have the same basic structure: end sac and convoluted duct which may expand into bladder
    • Nervous- Dorsal brain with connective nerves passing around anterior end of digestive tract; ventral nerve cord with ganglion in each body segment
    • Reproduction- Sexually (some are hermaphrodites), most have separate sexes that are distinguished by appendages on abdomen called pleopods (swimmerets); 1st (sometimes 2nd) pleopods are specialized for sperm transfer; they return to sea to release eggs
  • 10. Bibliography
    • &quot;Crustaceans.&quot; Kid Port . <>.
    • &quot;Crustaceans.&quot; The Sea . 27 Apr. 2008 <>.
    • &quot;Introduction to the Crustaceamorpha.&quot; UMCP . University of Berkely California. 27 Apr. 2008 <>.
    • Myers, Phil. &quot;Subphlyum Crustacea.&quot; Animal Diversity Web . University of Michigan Museum of Zoology. 27 Apr. 2008 <>.