. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 406 AETHEOPODA. rigid surfaces, which are oLtainccl partly by the development of internal chitinous tendons and plates, and partly by the hardening of the integument and the fusion of several segments to form larger armoured regions. It is only when the movements are simpler and resemble those of Annelids, that all the segments remain independent and bear similar appendages along the whole length of the body (larva?, Myriajoocla). In general, three regions of the body can be distinguished, the head,
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 406 AETHEOPODA. rigid surfaces, which are oLtainccl partly by the development of internal chitinous tendons and plates, and partly by the hardening of the integument and the fusion of several segments to form larger armoured regions. It is only when the movements are simpler and resemble those of Annelids, that all the segments remain independent and bear similar appendages along the whole length of the body (larva?, Myriajoocla). In general, three regions of the body can be distinguished, the head, the thorax, and the abdomen, the appendages of which possess respectively a different structure andfunction(). The head constitutes the short and compact anterior region of the body, is covered by a hard integument, encloses the 'brain and bears the sense organs and mouth-parts (jaws). The appendages of this region are modified to form the antennce and jaivs. The head of Arthropods, as compared with that of Annelids, contains, besides the frontal (pra?oral) or antennal segment and the oral segment, in. Fig. 326.—Head, thorax and abdomen of an Acridium, scon from the side. St, Stigmata; T, 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 Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
Size: 2250px × 1111px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
