[CobaltBlue]

Carnivores have a shorter intestinal tract than omnivores, typically, because it takes longer to break fruit and grain down into particles that the body can use. This is one reason that cats can eat rotten meat without getting sick - it passes through too quickly to cause infection.

[CobaltBlue]

Herbivores and omnivores get Vitamin C from their diet. Carnivores make their own.

Herbivores and omnivores sweat, carnivores pant.

Herbivores and omnivores have alkaline saliva, carnivores have acid saliva, and their stomach acid is 20 times stronger than that of herbivores and omnivores.

Many more differences, these are just the most obvious.