Biology - Animalia

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Author:
Wobbuffet
ID:
218007
Filename:
Biology - Animalia
Updated:
2013-05-06 05:25:19
Tags:
Animalia
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Description:
Phyla of Animalia
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  1. Porifera - Sponges (Pore bearer)
    • aquatic
    • no true tissues
    • two layers of cells surround a central gastric cavity lines with flagellated cells that draw water and microscopic food through pores in the body wall
    • body supported by spicules and fibers
    • may be solitary or colonial
    • Asymmetry
  2. Cnidaria - sea anemones, jellyfish, corals
    • Aquatic
    • body composed of many varied cells in 2 layers
    • radial symmetry
    • gastrovascular cavity with single opening to outside
    • moth surrounded by tentacles containing stinging cells (nematocysts)
    • two body forms - a motile medusa (jellyfish) and attached polyp
  3. Platyhelminthes - Flatworm
    • body flattened dorso - ventrally
    • bilateral symmetry
    • acoelomoate -  lacking a coelom
    • gut branched with single opening
  4. Mollusca - Shellfish
    • soft body composed of a heart, visceral mass and foot
    • body often covered by shell
    • three cell layers with coelom
    • bilateral symmetry
  5. Annelida - segmented worms
    • Cylindrical, segmented, elongated body
    • bilateral symmetry
    • three cell layers with coelom
    • bristles composed of chitin typically present
  6. Anthropoda - joint legged animals
    • Segmented, coelomate body
    • bilateral symmetry
    • chitinous jointed exoskeleton covers entire body
    • legs jointed
    • bouble, solid, ventral nerve cord
    • class: crustacea (crab), diplopoda (millipede), chilopoda (centipede), insecta (fly), arachnida (spider)
  7. Chordata
    • some stage in life:
    • Notochord (an internal, solid, stiffening rod)
    • Hollow dorsal nerve cord
    • paired pharyngeal gill slits
    • post anal tail
  8. SUB PHYLUM OF CHORDATA
    Vertebrata
    • Notochord partly or wholly replaced by vertebral column in adults
    • clearly differentiated head with brain enclosed in cranium
    • muscular ventral heart
    • class: Agnatha, chondrichthyes, pices, amphibia, reptilia, aves, mammalia

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