Souce:	http://michaelbluejay.com/veg/natural.html
Exhibit	Description	Carnivore	Omnivore	Herbivore	Human
A	Teeth: Canines	Long, sharp and curved	Long, sharp and curved	Dull and short or long (for defense), or none	Short and blunted
B	Chewing	None; swallows food whole	Swallows food whole and/or simple crushing	Extensive chewing necessary	Extensive chewing necessary (Chews gum)
C	Saliva	No digestive enzymes	No digestive enzymes	Carbohydrate digesting enzymes	Carbohydrate digesting enzymes
D	Stomach type	Simple	Simple	Simple or multiple chambers	Simple
E	Stomach acidity with food in stomach	≤ pH 1	≤ pH 1	pH 4-5	pH 4-5
F	Length of small intestine	3-6 times body length	4-6 times body length	10-12+ times body length	* 10-11 times body length
G	Colon	Simple, short, and smooth	Simple, short, and smooth	Long, complex; may be sacculated	Long, sacculated
H	Liver	Can detoxify vitamin A	Can detoxify vitamin A	Cannot detoxify vitamin A	Cannot detoxify vitamin A
I	Kidney	Extremely concentrated urine	Extremely concentrated urine	Moderately concentrated urine	Moderately concentrated urine
J	Nails	Sharp claws	Sharp claws	Flattened nails or blunt hooves	Flattened nails
Etc.	For even more detailed physical differences please see above source
* "Body length" measured from neck to anus, as with the other animals
"Body length" measured from neck to anus, as with the other animals