Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 FIB. 74 a—Diagram ot the vertebra! column of aTeleostean fish with verte- bral constriction of the notochord. Ch, notochord; If/-, bony vertebral bodies ; J, membranous mtervertebral section. FIG. 71 b— Vertebra of a fish. K, ver- tebral body. Ob, neural arch (neura- pophysis) ; Ub, ha?mal arch (ha?mapo- physis) ; D. neural spine; D', haemal spine ; B, rib. uniform, segmentation and partially fuse with one another to f
Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 FIB. 74 a—Diagram ot the vertebra! column of aTeleostean fish with verte- bral constriction of the notochord. Ch, notochord; If/-, bony vertebral bodies ; J, membranous mtervertebral section. FIG. 71 b— Vertebra of a fish. K, ver- tebral body. Ob, neural arch (neura- pophysis) ; Ub, ha?mal arch (ha?mapo- physis) ; D. neural spine; D', haemal spine ; B, rib. uniform, segmentation and partially fuse with one another to form several successive regions, the parts of which are capable of a greater or less amount of movement upon one another (head, neck, thorax, lumbar region, etc.) In this case, however, the parts of the skeleton of the chief axis are usually less movable upon one another, while, on the contrary, a much more perfect locomotion is effected by the extensive movements of the paired extremities or limbs. The limbs likewise possess a solid skeleton, to which the muscles are attached, and which is usually elongated and may be external or internal, und is attached more or less closely to the axial skeleton. The most essential property of animals is that of sensation. This
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