Kingdom Animalia

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Kingdom Animalia
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Characteristics of Animals

• Eukaryotic cells have a nucleus and membrane
  bound organelles
• Heterotrophic must ingest their food
• Diploid two copies of each chromosome
• Multicellular made of many cells
• Forms a Blastula a hollow ball of cells

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Characteristics of Animals

• Motile can move during at least one stage of
  life
• Some that do not move during a stage of life are
  called sessile

See Visual Concepts Ch 28 Reproduction in
Jellyfish
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Animal Body Plan

• Animals are described according to their
  arrangement of body symmetry
• Asymmetry - irregular shape
• Radial symmetry - arranged around a central axis
• Bilateral symmetry - there are distinctive right
  and left halves

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Animal Body Plan

• Body Planes
• Dorsal - upper
• Ventral - lower
• Anterior - front
• Posterior - rear

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Internal Body Cavity

• Acoelomates have no body cavity filled with
  tissue (ex flatworms)
• Pseudocoelomates have a body cavity located
  between the mesoderm and endoderm (roundworms)
• Coelomate have a true coelom, a body cavity
  located entirely within the mesoderm (segmented
  worms, and higher animals including humans)

Ectoderm Mesoderm Endoderm