View source for Table: The Comparative Anatomy of Eating

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! colspan="5" |The Comparative Anatomy of Eating (Dr. Milton Mills)
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|Trait
|Human
|Herbivore
|Omnivore
|Carnivore
|-
|Intestines: Small 
|10–11 times body length
|10–12+ times body length
|4–6 times body length
|3–6 times body length
|-
|
Intestines: Colon
|Long, sacculated
|Long, complex; may be sacculate
|Simple, short, and smooth
|Simple, short, and smooth
|-
|Teeth: Incisors
|Broad, flat, and spade shaped
|Broad, flat, and spade shaped
|Short and pointed
|Short and pointed
|-
|Teeth: Canines
|Short and blunted
|Dull and short or long (for defense) or none
|Long, sharp, and curved
|Long, sharp, and curved
|-
|Teeth: Molars
|Flat with nodular cusps
|Flat with cusps vs. complex surface
|Sharp blades or flattened
|Sharp, jagged, and blade shaped
|-
|Saliva
|Carbohydrate-digesting enzymes
|Carbohydrate-digesting enzymes
|No digestive enzymes
|No digestive enzymes
|-
|Stomach: Type
|Simple
|Simple or with multiple chambers
|Simple
|Simple
|-
|Stomach: Acidity with Food
|pH 4–5
|pH 4–5
|≤ pH 1
|≤ pH 1
|-
|Stomach: Capacity
|21% to 27% of total volume of digestive tract
|< 30% of total volume of digestive tract
|60% to 70% of total volume of digestive tract
|60% to 70% of total volume of digestive tract
|-
|Chewing
|Extensive chewing necessary
|Extensive chewing necessary
|Swallows food whole or simple crushing
|None; swallows food whole
|-
|Nails
|Flat nails
|Flat nails or blunt hooves
|Sharp claws
|Sharp claws
|-
|Jaw: Type
|Expanded angle
|Expanded angle
|Angle not expanded
|Angle not expanded
|-
|Jaw: Joint Location
|Above the plane of the molars
|Above the plane of the molars
|On the same plane as molar teeth
|On the same plane as molar teeth
|-
|Jaw: Motion
|No shearing; good side-to-side, front-to-back motion
|No shearing; good side-to-side, front-to-back motion
|Shearing; minimal side-to-side motion
|Shearing; minimal side-to-side motion
|-
|Major Muscles
|Masseter and pterygoids
|Masseter and pterygoids
|Temporalis
|Temporalis
|-
|Mouth Opening  vs. Head Size
|Small
|Small
|Large
|Large
|-
|Facial Muscles
|Well developed
|Well developed
|Reduced
|Reduced to allow wide mouth gape
|-
|Liver
|Cannot detoxify vitamin A
|Cannot detoxify vitamin A
|Can detoxify vitamin A
|Can detoxify vitamin A
|-
|Kidney
|Moderately concentrated urine
|Moderately concentrated urine
|Extremely concentrated urine
|Extremely concentrated urine
|-
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| colspan="3" |Source: Mills, M.D., Milton. “The Comparative Anatomy of Eating | Digestion | Gastrointestinal Tract.” Scribd. Accessed February 15, 2019. https://www.scribd.com/doc/94656/The-Comparative-Anatomy-of-Eating.
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