Beginners' zoology . &.mDA Fig. 304.—Anatomy of Dove x^^ ik, keel of breastbone; G, g, brain; Ir,windpipe; lu, lung; h, heart; sr, gul-let; k, crop; dr, glandular stomach;vim, gizzard; d, intestine; «, kidney;hi, ureter; eil, openings of ureter andegg duct into cloaca, Fig. 305. — Food Tube of Bird. P, pancreas; C, caeca. Question: Identify each part by meansof Fig. 304. is found in the V-shaped depression at the angle of thew^ishbone, just before the food tube enters the food is stored and softened in the crop. From thecrop the food passes at intervals into the glandular stoma
Beginners' zoology . &.mDA Fig. 304.—Anatomy of Dove x^^ ik, keel of breastbone; G, g, brain; Ir,windpipe; lu, lung; h, heart; sr, gul-let; k, crop; dr, glandular stomach;vim, gizzard; d, intestine; «, kidney;hi, ureter; eil, openings of ureter andegg duct into cloaca, Fig. 305. — Food Tube of Bird. P, pancreas; C, caeca. Question: Identify each part by meansof Fig. 304. is found in the V-shaped depression at the angle of thew^ishbone, just before the food tube enters the food is stored and softened in the crop. From thecrop the food passes at intervals into the glandular to this is the muscular stomach, or gizzard. Are theplaces of entrance and exit on opposite sides of the gizzard,or near together } (Fig. 304.) Is the lining of the gizzard 164 BEGINNERS ZOOLOGY rougli or smooth? Why? Is the gizzard tough or weak?Why are small stones in the gizzard ? Why do not hawksand other birds of prey need a muscular gizzard ? Theliver and pancreas empty their secretions into the intestinesby several ducts a little way beyond the gizzard. Beyondthe mouths of two casca (Fig. 305) the many-coiled intestine empties into the straightrectum, which terminates in awidened part called the only the intestine, but thetwo ureters of
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
