Digestion (1) - Animal Nutrition ENERGY FROM SUN ENERGY...

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Animal Nutrition
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ENERGY FROM SUN PHOTOSYNTHESIS ENERGY ABSORPTION IN LEAVES CELLULAR RESPIRATION GROWTH CONSUMPTION GROWTH CELLULAR RESPIRATION
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Nutritional Requirements Meeting Basic Needs Nutrients (needed for metabolism, cell function) Recommended daily allowances are an estimate of the basic nutritional needs of humans. Some amino acids and vitamins must be obtained in the diet. Essential elements; such as calcium, iron, and sodium, are used in a variety of ways in the body. Carbohydrates (needed for energy) Chemical energy in food is measured in calories or kilocalories. Glycogen, not fatty acids, provides the fuel for extended exertion.
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Salivary glands Secretes enzymes (amylases) that digest carbohydrates Liver Secretes molecules required for digestion of fats (bile) Gall bladder Stores secretions from liver; empties into small intestine Pancreas Secretes enzymes and other materials into small intestine 1. Mouth Mechanical and chemical processing (chewing reduces size of food; saliva digests carbohydrates) 2. Esophagus Transports food 3. Stomach Mechanical and chemical processing (digestion of proteins) 4. Small intestine Chemical processing and absorption (digestion of proteins, fats, carbohydrates; absorption of nutrients and water) 5. Large intestine Water absorption and feces formation
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Obtaining food: The structure and function of beaks, teeth, and mouthparts.
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