Diagnostic methods, chemical, bacteriological and microscopical : a text-book for students and practitioners . t a pair of jointed appendages. The segments are often more or lessfused, thus forming special body-regions which may themselves be more or lessfused together as well. The covering of these animals is a comparatively 152 DIAGNOSTIC METHODS. thick^and strong cuticle which remains pliable between the segments of thebody and of the jointed appendages, but which commonly becomes hard andshell-like from chitinous or calcareous material directly over the different body-segments and internod
Diagnostic methods, chemical, bacteriological and microscopical : a text-book for students and practitioners . t a pair of jointed appendages. The segments are often more or lessfused, thus forming special body-regions which may themselves be more or lessfused together as well. The covering of these animals is a comparatively 152 DIAGNOSTIC METHODS. thick^and strong cuticle which remains pliable between the segments of thebody and of the jointed appendages, but which commonly becomes hard andshell-like from chitinous or calcareous material directly over the different body-segments and internodes of the jointed appendages. This arrangement re-quires that in the growth of the individual the firm external covering shouldfrom time to time be shed, such changes taking place periodically and beingknown as moults. While each segment in the primitive animal is provided witha pair of jointed appendages, these in the individual species are often lostfrom this or that part of the body, or may remain rudimentary and inconspicu-ous or may take on special features of structure from the assumption of special.
Size: 1293px × 1932px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectdiagnosis, bookyear19
