page_title: Equine anatomy
section_title: Stomach
hierarchical_section_title: Equine anatomy / Digestive system / Stomach
caption_attribution_description: English: Equine stomach. Equus Technique of dehydration - piece showing the stomach on display at the Museum of Veterinary Anatomy, FMVZ USP. This file was published as the result of a partnership between the Museum of Veterinary Anatomy FMVZ USP, the RIDC NeuroMat and the Wikimedia Community User Group Brasil. This GLAM project is reported. Photography: Museum of Veterinary Anatomy FMVZ USP.
context_page_description: Equine anatomy refers to the gross and microscopic anatomy of horses and other equids, including donkeys, and zebras. While all anatomical features of equids are described in the same terms as for other animals by the International Committee on Veterinary Gross Anatomical Nomenclature in the book Nomina Anatomica Veterinaria, there are many horse-specific colloquial terms used by equestrians.
context_section_description: Horses have a relatively small stomach for their size, and this limits the amount of feed a horse can take in at one time.  The average sized horse (360 to 540 kg [800 to 1,200 lb]) has a stomach with a capacity of around 19 L (5 US gal), and works best when it contains about 7.6 L (2 US gal). Because the stomach empties when ​²⁄₃ full, whether stomach enzymes have completed their processing of the food or not, and doing so prevents full digestion and proper utilization of feed, continuous foraging or several small feedings per day are preferable to one or two large ones.  The horse stomach consists of a non-glandular proximal region (saccus cecus), divided by a distinct border, the margo plicatus, from the glandular distal stomach.
  In the stomach, assorted acids and the enzyme pepsin break down food. Pepsin allows for the further breakdown of proteins into amino acid chains. Other enzymes include resin and lipase. Additionally, the stomach absorbs some water, as well as ions and lipid-soluble compounds.
caption: Equine stomach.
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