. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 70 OKGAKIZATIOX X^D DEVELOPMrNT OF ANIMALS IX walls, traversed by numerous septa and folds which bear an extremely rich network of capillaries. The ah- tubes or trachece (fig. 65) consti- tute a branched system of canals which extend throughout the whole body, and carry the air to all the organs. Thus instead of the respi- ratory pro- cess being localised, as it is in ani- mals with lungs, it is carried on in all tissues and organs of the body, which are surroun d e d by a fine tracheal ne
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. 70 OKGAKIZATIOX X^D DEVELOPMrNT OF ANIMALS IX walls, traversed by numerous septa and folds which bear an extremely rich network of capillaries. The ah- tubes or trachece (fig. 65) consti- tute a branched system of canals which extend throughout the whole body, and carry the air to all the organs. Thus instead of the respi- ratory pro- cess being localised, as it is in ani- mals with lungs, it is carried on in all tissues and organs of the body, which are surroun d e d by a fine tracheal network. Kevertheless, the air tubes in the case of the modification known as fan- trackece present an approximation in their structures to lungs, in that the main stems, without further branching, give rise to flat hollow FiQ. 65.—Trachere with fine brauches (after Leydig). Z, cellular outer wall; Sp, spiral thread. K. 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: 1413px × 1768px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
