| Anatomy of Meat Eaters | Anatomy of Plant Eaters | Anatomy of Human Beings | |
| 1 | Intestines only 3 times the body length, so that meat which decays rapidly can pass out of body quicker | Intestines 10-12 times the body length so that fruits and vegetables which do not decay rapidly can pass through slowly enabling optimal absorption | Intestinal tract 12 times body length |
| 2 | Small salivary glands in the mouth (not needed to pre-digest fruits and grains) | Well-developed salivary glands needed to predigest fruits and grains | Well-developed salivary glands needed to predigest fruits and grains |
| 3 | Acid saliva; no enzyme ptyalin to predigest grains | Alkaline saliva; much ptyalin to predigest grains | Alkaline saliva; much ptyalin to predigest grains |
| 4 | No flat back molar teeth to grind | Flat back molar teeth to grind food | Flat back molar teeth to grind food |
| 5 | jaws move only up and down, requiring them to tear chunks of flesh from their prey and swallow them whole | can move their jaws up and down and from side to side, allowing them to grind up fruit and vegetables with their back teeth | can move their jaws up and down and from side to side, allowing them to grind up fruit and vegetables with their back teeth |
| 6 | impossible for carnivores to develop hardening of the arteries, no matter how much animal fat they consume. | not designed to process animal flesh, so all the excess fat and cholesterol from a meat-based diet blocks arteries and causes heart disease | not designed to process animal flesh, so all the excess fat and cholesterol from a meat-based diet blocks arteries and causes heart disease |
| 7 | have sharp claws and large canine teeth capable of tearing flesh | short, softer fingernails and pathetically small “canine” teeth | short, softer fingernails and pathetically small “canine” teeth |
(*Source: Michealbluejay.com, PETA, desiretreenetwork)