Animal Kingdom

1
Animal Kingdom

• Multicellular, heterotrophic eukaryotes

2
Characteristics

• Take in organic molecules by ingestion
• Collagen- structural protein- ecm
• 2 tissues unique to animals
• Nervous-impulse conduction
• Movement-muscle tissue

3
Reproduction

• Mostly sexual with flagellated sperm and
  nonmotile egg
• After fertilization zygote undergoes cleavage
• Blastula
• Gastrulation
• Gastrula
• Larva

4
Phylogeny

• Parazoa-no true tissues- sponge
• Eumetazoa-tissues
• Radiata-radial symmetry diploblastic( 2 layers
  ectoderm, endoderm)
• Cnidaria( sea anemones) Ctenophora(comb jellies)
• Bilateria
• Acoelomates- solid body-Platyhelminthes tapeworm
• Pseudocoelomates-incomplete mesoderm body
  cavity-Nematoda( round worms),Rotifera
• Coelomates

5
Coelomates-body cavity lines with complete
mesoderm

• Protostomes
• Spiral cleavage,Mouth develops form
  blastopore,mesoderm splits to form coelom
• Nemertea(probiscis worms)
• Mollusca-clams,snails,squids
• Annelids-segmented worms
• Arthropoda-crustaceans,insects,spiders

6
Coelomates cont.

• Deuterstomes
• Radial cleavage, anus develops from blastopore,
• Echinodermata- sea stars, sea urchins
• Chordata-lancelets,tunicates, chordata