Mammalian digestive tracts

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% volume of digestive tract Carnivore (dog) Hindgut F (horse) Foregut F (sheep) stomach 65 9 67* small intestine 20 30 20* caecum
3 basic patterns: Carnivores/insectivores: food (meat) is easy to process and digest, so 1. Relatively short post-gastric tract (2-6 X HBL) 2. Caecum reduced or absent 3. Little differentiation between small and large intestines Other 2 patterns are 2 major kinds of herbivores = hindgut and foregut (ruminant) fermenters Deal with housing and using microbes in different ways (see next slide, also the many digestive tracts shown on your handout)
Page 1 and 2: Mammalian digestive tracts Mouth: m
Page 3: Problem: most E in leaves/grass not
Page 7 and 8: Advantages of microbial fermentatio
Page 9 and 10: Hindgut fermenters process food abo
Page 11 and 12: Mammals are not just passive compon
Page 13 and 14: Thus, competitive advantage of pere
Page 15 and 16: • Exclosures for 40+ yrs • Sele
Page 17 and 18: Could note lots of other studies sh
Page 19 and 20: Kelp forests are rich, diverse mari
Page 21: OK, didn’t quite finish this one

Mammalian digestive tracts

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