ClipArt ETC
The stomach of a grain-eating bird, which has a gizzard that functions to crush the seeds to pieces since birds have no teeth to crush their food. It has on its inside two hard surfaces which rub and press against each other by muscles to grind food. At <em>b</em> is the gizzard cut open, showing two hard grinding surfaces, and at <em> a </em> above is the part from which oozes the gastric juice.

Stomach of a Bird

The stomach of a grain-eating bird, which has a gizzard that functions to crush the seeds to pieces…

"Digestive system of the common Fowl. o, Gullet; c, Crop; p, Proventriculus; g, Gizzard; sm, Small intestine; k, Intestinal caeca; l, Large intestine; cl, Cloaca." &mdash; Winston's Encyclopedia, 1919

Fowl Digestive System

"Digestive system of the common Fowl. o, Gullet; c, Crop; p, Proventriculus; g, Gizzard; sm, Small intestine;…

"a, head, antennae, &c; b, pharynx; c, crop; d, gizzard; e, chyle-forming stomach; f, biliary vessels; g, small intestine; h, secreting organs" &mdash; Goodrich, 1859

Digestive Apparatus of an Insect

"a, head, antennae, &c; b, pharynx; c, crop; d, gizzard; e, chyle-forming stomach; f, biliary vessels;…