Taxonomy

Kingdom Animalia












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Animals 
















Animals;
   -are eukaryotic
   -are heterotrphic through ingestion
   -lack cell walls
   -are multicellular

Early animal
   -fertilization, zygote
   -cleavage, rapid mitotic division with out any growth
   -gastrulation, formation of three tissue layers, includes the endoderm, mesoderm, and exoderm
   -cell differential "cell specialization"
   -differential gene expression, where cells selectively turn on and off different genes

Body
   -bilateral symmetry, can be divided lengthwise and still be identical
   -radial symmetry, can be divided any way from axis, top to bottom 
   -asymmetry, no symmetry at all
   -body cavity, acoelomate with no body cavity, pseudocoelomate has a false body cavity, eucoelomate with the cavity completely lined with mesoderm

Skeletons
   -endoskeleton, bone, cardilage covered by tissue
   -endoskeleton, cition
   -hydroshatic, body cartilage under pressure changes

deer.jpg














mollusks,annelids

Anthropoda

sponges,cnidarians,round&flatworms

echinoderms and invertebrates

Subphylum Vertebrata

reptiles and birds

mammals