8. Invert I

8. Invert I - Invertebrate Diversity I Next Lab After...

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Invertebrate Diversity I
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Next Lab – After Spring Break!!! Quiz #5 – Post Lab Exercise 8 and Pre Lab Exercise 9 !!! Bring goggles!!! Bring dissection kits!! I will do my best to pass back exam #1
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What percent of the earth’s animals are invertebrates? 95%!! Trivia
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Domain Archaea Domain Bacteria Domain Eukarya o Kingdom Fungi o The Protists (formerly Kingdom Protista) o Kingdom Plantae o Kingdom Animalia Review:
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Kingdom Animalia Characteristics: o Heterotrophic o Multicellular o No cell walls o Have unique tissues (e.g. nervous & muscular tissue)
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How do we classify Animals? Symmetry (bilateral vs radial) Coelom Embryonic development
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Types of symmetry… Asymmetrical without symmetry; irregularly shaped Ex: sponges
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Types of symmetry… Radial parts radiate from the center like spokes on a wheel No left or right sides If cut longitudinally, two pieces are identical halves
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Types of symmetry… Bilateral Has a left and a right side If you cut down the center, two pieces are mirror images of each other
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Different Germ (Tissue) Layers that Develop in Embryos Endoderm - (yellow) innermost layers Becomes: gut, liver, lungs Mesoderm - (blue) middle layer Becomes: skeleton, heart, kidney, muscle, blood Ectoderm - (red) outermost layer Becomes: skin nervous system
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Classification Based on Germ Layers Diploblastic - two layers, endoderm and ectoderm only Triploblastic - three layers, endoderm, mesoderm and ectoderm
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Types of Ceoloms (Body Cavities) Seen in Animals Acoelomate - no true body cavity Pseudocoelomate - ”false” body cavity not completely lined with mesoderm Coelomate - body cavity completely lined with mesodermal tissue
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Embryonic Development Protostome -blastopore becomes the mouth (“first mouth”) Deuterostome - blastopore becomes the anus (“second mouth”) More details on this next time
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Sponges Asymmetrical NO tissues, only cells Mobility Adults= sessile Larva= free-swimming
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This note was uploaded on 10/20/2009 for the course BIOL 112 taught by Professor Vaughn during the Spring '08 term at Texas A&M.

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8. Invert I - Invertebrate Diversity I Next Lab After...

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