. The bee-keeper's guide : or Manual of the apiary . Bee culture; Bees. Brain and Nervous System. 65 caterpillar, .nearly eight times as many as are found m thj human body. The strength, too, of insects is prodigious. There must be quality in muscles, for muscles as large as those of the elephant and as strong as those of the flea would hardly need the fulcrum which the old philosopher demanded in order to move the world. Fleas have been made to draw miniature cannon, chains and -vagons many hundred times heavier than themselves. The nerves of insects are in no wise peculiar, so far as known,
. The bee-keeper's guide : or Manual of the apiary . Bee culture; Bees. Brain and Nervous System. 65 caterpillar, .nearly eight times as many as are found m thj human body. The strength, too, of insects is prodigious. There must be quality in muscles, for muscles as large as those of the elephant and as strong as those of the flea would hardly need the fulcrum which the old philosopher demanded in order to move the world. Fleas have been made to draw miniature cannon, chains and -vagons many hundred times heavier than themselves. The nerves of insects are in no wise peculiar, so far as known, except in position. Each nerve consists of a bundle of fibers some of which are sensitive and some motor. As in our bodies, some are knotted, or have gang- lia, and some are not. The main nervous cord is double, and has several enlargements (Fig. 16) or ganglia. It runs along the under or ventral side of the body, (Fig. 16), separates Fig. Brain oj Inseci, ajter Dujardrm a a Antennas. 000 Ocelli. near the head, and after passing around the esophagus, enlarges to form the largest of the ganglia, which serves as a brain (Fig. 17). From the brain many fibers extend on each side to the compound eyes. The minute nerves extend everywhere, and in squeezing out the viscera of an insect, are easily visible. In the larva the nerve cord is much as in the adult insect, except the ganglia are more numerous. Girard says, that at first in the larva of the bee there are seventeen ganglia. The supra-sesophageal or brain, three sub-aesophageal, three thoracic—one for each ring—and ten abdominal. Soon the three sub-sesophageal merge into one, as do also. 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 Cook, Albert John, 1842-1916. Chicago, Ill. : George W. York & Co.
Size: 1767px × 1414px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectbees, bookyear1894
