Circulation - Why is nutrition an essential life function?...

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6/6/11 Why is nutrition an essential life function?
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6/6/11 Food is digested (Broken down) to
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6/6/11 Interesting……Nutrients must travel (circulate)
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6/6/11 AIM: How is the circulatory
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6/6/11 Evolutionary Perspective
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6/6/11 Considering evolutionary history, organismal systems
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6/6/11 Let’s consider the circulation of nutrients in the Paramecium
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6/6/11 Let’s consider the circulation of nutrients in the Paramecium
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6/6/11
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6/6/11 How would you compare the cellular arrangement (structure) of the Hydra to the structure of the Paramecium ? Paramecium Hydra
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6/6/11 How would you compare the cellular arrangement (structure) of the Hydra to the structure of the Paramecium ? Paramecium Hydra
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6/6/11 Circulation: Hydra Points to Consider: Extracellular digestion of macronutrients How are digested
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6/6/11 Circulation: Hydra Points to Consider: Extracellular digestion of macronutrients How are digested
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6/6/11 Phylum: Cnidaria Circulation flagellated cells circulate in GV cavity circulate materials
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6/6/11
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6/6/11 Structure of the Hydra
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6/6/11 Kingdom: Animalia Phylum: Platyhelminthes Class: Turbellaria Class: Trematoda Class: Cestoda free-living planaria parasitic tapeworms parasitic flukes
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6/6/11 no organized circulatory or respiratory systems thin, flat bodies allow diffusion of nutrients and gases centralized nervous system (cephalization) brain and sensory organs at head 2 nerve cords run length of body digestive system free-living planaria has branched one; single opening parasitic tapeworm has none reproductive system sexual- hermaphrodites both testes and ovaries, uterus in mesoderm layer cross- or self-fertilization Phylum: Platyhelminthes
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6/6/11 All other Metazoans have diverse complexity of their
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6/6/11 How would you define an organ system?
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6/6/11 How would you define an organ system?
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6/6/11 Problem: Paramecium and Hydra are
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6/6/11 IN GROUPS:
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6/6/11 Circulatory System You would need: Tubes (vessels) Arteries Veins Capillaries Heart Pump Valves
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6/6/11 Let’s come back to your suggestions in a little bit….
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Circulation - Why is nutrition an essential life function?...

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