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| PHYSIOLOGICAL COMPARISONS | ||
| MEAT-EATER | HERBIVORE | MAN |
| Has claws | No claws | No claws |
| No skin pores, perspires through tongue | Perspires through skin pores | Perspires through skin pores |
| Sharp front teeth for tearing, no flat molar teeth for grinding | No sharp front teeth has flat rear molars | No sharp front teeth has flat rear molars |
| Intestinal tract 3 times body length so rapidly decaying meat can pass out quickly | Intestinal tract 10-12 times body length | Intestinal tract 12 times body length |
| Strong hydrochloric acid in stomach to digest meat | Stomach acid 20 times less strong than meat-eaters | Stomach acid 20 times less strong than meat-eaters |