. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. i6o y4NlMAL ACTIVITIES. Nutrition. In the clam the various processes con- cerned in nutrition are more distinctly separated than in any of the other sub-kingdoms below the Arthrop- oda. When the food enters the mouth it passes down the throat to the stomach. The dark portion of the body surrounding this alimentary canal is the liver, which secretes digestive fluids and pours them on the food. The intestine beyond the stomach passes directly. Fig. 125.—Digestive Tube of Fresh-water Mussel (AnodonK m, mouth; /, liver; s, st
. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. i6o y4NlMAL ACTIVITIES. Nutrition. In the clam the various processes con- cerned in nutrition are more distinctly separated than in any of the other sub-kingdoms below the Arthrop- oda. When the food enters the mouth it passes down the throat to the stomach. The dark portion of the body surrounding this alimentary canal is the liver, which secretes digestive fluids and pours them on the food. The intestine beyond the stomach passes directly. Fig. 125.—Digestive Tube of Fresh-water Mussel (AnodonK m, mouth; /, liver; s, stomach; i and t\ intestine; «, anus; /, pericardium; k, kidney; , chamber above gills; g, gullet. through the heart and opens into the cloacal chamber in the current of water which passes out of the upper siphon. The digested food is taken up by the blood and carried to all parts of the body by the circulating system. The most important organ of this circulating system is the heart, which is situated just below the hinge. It has a ventricle and two auricles. In its course, part of the blood is purified by the gills. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original French, Nathaniel Stowers, 1854-. New York [etc. etc. ] Longmans, Green and Co
Size: 1942px × 1287px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjecta, booksubjectzoology
