6.3: Digestive System Classification

Introduction to Animal Science · LibreTexts

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    From LibreTexts, under CC BY 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Digestive systems are classified based on stomach complexity and the primary method of digestion.

    Monogastrics, or nonruminants, possess a single, simple stomach and typically consume energy-dense, easily digestible diets. Digestion relies primarily on the animal's own enzymes (autoenzymatic digestion).

    These nonruminant animals utilize plant fiber by housing large populations of fermenting microorganisms primarily in the cecum and large colon—collectively called the hindgut.

    These animals utilize roughage and fiber extensively. Their digestion is alloenzymatic, relying on microorganisms for complex breakdown.

    A llama's staring with an open mouth.

    Image credit: Magnus Martinsen from Pexels: https://www.pexels.com/photo/brown-f...animal-706194/

    This page titled 6.3: Digestive System Classification was last modified on Sat, 02 May 2026 03:51:12 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Deanne Pawlisch.