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Digestion - Animals Digestion Animals and Nutrition and Do...

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1 Animals: Digestion Animals: Digestion and Nutrition and Nutrition Do you like pizza? Digestion and Nutrition Let Let’ s eat something s eat something
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2 Enjoy eating Enjoy eating Outline Outline 1. Key concepts 2. Nutrition 3. Comparison of different animals’ digestive systems 4. Human digestive system 5. Key terms 6. Conclusions Key Concepts Key Concepts Food can be 1. Sources of energy A. Carbohydrates B. Fats C. Proteins 2. Sources of nutrients for growth and metabolism A. Protein B. Minerals C. Vitamins D. Lipids Digestion – breakdown of food into molecules that can be absorbed by the body cells.
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3 Nutrition Nutrition Undernourished: Diet is deficient in calories Kwashiorkor Kwashiorkor How come you are How come you are sooo sooo fat? fat? Overnourishment Homeostasis of fat Leptin and other genes Malnourished & Essential nutrients “8” Essential amino acids #9 histidine
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4 Table 41.1a Vitamin Requirements of Humans Table 41.1a Vitamin Requirements of Humans Table 41.1b Vitamin Requirements of Humans Table 41.2a Mineral Requirements of Humans
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5 Table 41.2b Mineral Requirements of Humans Digestive systems of different animal types animal types 1. Intracellular digestion - “paramecium” 2. Simple sac - “hydra” Comparison Flatworm Digestive cavity has only one opening, highly branched digestive cavity. they cannot feed, digest and eliminate at the same time. Food cannot be processed continuously. Nutrient molecules come to cells by diffusion.
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