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Nutrition lesson 3 evolution of digestive systems.notebook
1
March 22, 2018
Mar 2412:07 PM
Aim: Compare nutrition in different organisms as they increase in size and complexity.
HW. Do take home quiz. Use it to study. Study posted vocabulary.
1. Go over homework.
2. Review nutrition
3. Comparison of some digestive systems
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Nutrition lesson 3 evolution of digestive systems.notebook
2
March 22, 2018
Mar 3012:32 PM
Paramecium (unicellular)
Ameba / Amoeba unicellular
Ingestion by endocytosisphagocytosis and pinocitosis (case of active transport)
Digestion is intracellular in lysosomes (contain hydrolitic enzymes.)
Digested products diffuse into cytoplasm.
Egestion by exocytosis.
phagocytosis
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Nutrition lesson 3 evolution of digestive systems.notebook
3
March 22, 2018
Mar 3012:47 PM
Hydra
Through mouth, use for ingestion and egestion
Two way digestive cavityDigestion is both extra cellular and intracellular (phagocytosis) along cavity.
Digested products are diffused into neighbor cells
Ingestion
Digestion
Absorption
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Nutrition lesson 3 evolution of digestive systems.notebook
4
March 22, 2018
Apr 18:42 PM
Digestion in the round worm:Adaptations:
1. One way digestive system
2. Organic digestion
3. Primitive Stomach (gizzard)
4. Internal fold increase surface for absorption.
Crop thin walled organ temporary stores food.
Ingestion
Digestion
Absorption
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Nutrition lesson 3 evolution of digestive systems.notebook
5
March 22, 2018
Apr 511:55 AM
Nutrition in the grasshopper
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Nutrition lesson 3 evolution of digestive systems.notebook
6
March 22, 2018
Mar 269:20 AM
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Nutrition lesson 3 evolution of digestive systems.notebook
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March 22, 2018
Mar 293:10 PM
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