Stomach of a Sheep

Compartments of a ruminant stomach, laid open. A, rumen- a, pillars; b, papilla; c, esophageal orifice. B, reticulum- a, alveoli; b, esophageal canal. C, psalterium- a, hooked papillae; b, valve at orifice leading to abomasum; c, d, e, f, leaves graduated from large to small. D, abomasum- a, folds of mucous membrane; b, pyloric orifice; c, duodenum.

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