. The anatomy of the domestic animals . Veterinary anatomy. INTERIOR 459 ventrally on the right wall of the atrium and reticulum to end at the reticulo- omasal It is about seven or eight inches (ca. 18-20 cm.) in length Its axial direction is chiefly dorso-ventral, but it inclines forward to a variable extent and somewhat medially in its ventral part; the ventral end, which is at the reticulo- omasal orifice, is about an inch (ca. cm.) in front of the plane of the cardia and to the right of the median plane. The groove is twisted in a spiral fashion, so that Its thickened edges o
. The anatomy of the domestic animals . Veterinary anatomy. INTERIOR 459 ventrally on the right wall of the atrium and reticulum to end at the reticulo- omasal It is about seven or eight inches (ca. 18-20 cm.) in length Its axial direction is chiefly dorso-ventral, but it inclines forward to a variable extent and somewhat medially in its ventral part; the ventral end, which is at the reticulo- omasal orifice, is about an inch (ca. cm.) in front of the plane of the cardia and to the right of the median plane. The groove is twisted in a spiral fashion, so that Its thickened edges or lips project first backAvard, then to the left, and finally for- ward. The twist involves chiefly the left lip, and the relative position of the lips IS reversed at the ventral end. The mucous membrane on the lips of the oesoph- ageal groove is brown and wrinkled, like that of the atrium; in the bottom of the. - - interior \ I \ \ Fig. 391.—Omasum of Ox, Sagittal Section; Right View. 1, 2, 3, 4, Laminae of various orders; 5, muscular pillar; 6, neck coanecting with reticulum; 7, connection with abomasum. groove it is pale, like that of the cesophagus, marked by longitudinal folds, and pre- sents pointed, horny papilla on its ventral part. In the reticulum the mucous membrane is raised into folds about half an inch high, which enclose four-, five-, or six-sided spaces or cells (Cellulse reticuli); this peculiar arrangement suggested the scientific name and also the popular term "; These cells are subdivided by smaller folds, and the bottoms are studded with pointed, horny papillae. The cells grow smaller and gradually dis- appear near the oesophageal groove and the edge of the rumino-reticular fold; an inch or two from the latter the mucous membrane has the papillary arrangement of the rumen. At the reticulo-omasal orifice there are peculiar horny papillae, which are curved and resemble the claws of a small bird; hence they are termed unguliform (Papilla
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