2. LIVING PRIMATES-1 - 1/8/11 1 EVOLUTION OF DIGESTIVE...

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Unformatted text preview: 1/8/11 1 EVOLUTION OF DIGESTIVE SYSTEM OF OMNIVORES I. DIGESTIVE STRATEGIES OF HERBIVORES II. DIGESTIVE STRATEGIES OF OMNIVORES: PRIMATES III. PRIMATE TAXONOMY BY DIETARY PREFERENCE IV. WHY PRIMATES SEARCH FOR ANIMAL FOOD V. OVERVIEW I. OMNIVORE DIGESTIVE SYSTEM: HUMAN I . DIGESTIVE STRATEGIES OF HERBIVORES: ADAPTATION OF THE GASTROINTESTINAL TRACT Colon Cecum Reticulum Omasum Abomasum Colon Rumen Small intestine Cecum A . Hindgut B. foregut: ruminant Small intestine 1/8/11 2 Foregut fermenter: ruminant Rumen Small intestine Reticulum Omasum Abomasum Cecum Food chewed Several times Rate of Passage: 80 hrs Cellulose Utilization: 60% Colon Foregut fermenter: ruminant Stomach with 3-chambers Foregut fermenter: ruminant Stomach with 4-chambers 1/8/11 2 Foregut fermenter: ruminant Rumen Small intestine Reticulum Omasum Abomasum Cecum Food chewed Several times Rate of Passage: 80 hrs Cellulose Utilization: 60% Colon Foregut fermenter: ruminant Stomach with 3-chambers Foregut fermenter: ruminant Stomach with 4-chambers 1/8/11 3 Foregut fermenter: ruminant Stomach with 3-chambers Hindgut fermenter Stomach Colon Cecum Small intestine Food chewed once Rate of passage: 48 hrs Cellulose utilization: 45% Hindgut fermenter: 1/8/11 4 BIOCHEMICAL PROCESS OF DIGESTION IN RUMINANTS II. DIGESTIVE STRATEGIES OF OMNIVORES: PRIMATES A. Sacculated Stomach B. Enlargement of the Colon C. Enlargement of the Small Intestine D. Reduction of the Small Intestine?...
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2. LIVING PRIMATES-1 - 1/8/11 1 EVOLUTION OF DIGESTIVE...

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