. Chordate anatomy. Chordata; Anatomy, Comparative. 148 CHORDATE ANATOMY skeleton is still cartilaginous, but the cartilage is often hardened with lime. Bony vertebrae make their appearance in ganoid fishes, some of which however retain a cartilagin- ous vertebral column. Ball-and- ^^^^^^ socket joints between the centra are developed in Lepidosteus (gar- pike) as in some Amphibia. Am- phicoelous or biconcave vertebrae, however, predominate in all groups of fishes. Centra are wanting in Fig. 136.—Sagittal section of Sqaulas the Dipnoi, vertebrae, cut surfaces obliquely lined. ^-^j^ ^-^^ amphib
. Chordate anatomy. Chordata; Anatomy, Comparative. 148 CHORDATE ANATOMY skeleton is still cartilaginous, but the cartilage is often hardened with lime. Bony vertebrae make their appearance in ganoid fishes, some of which however retain a cartilagin- ous vertebral column. Ball-and- ^^^^^^ socket joints between the centra are developed in Lepidosteus (gar- pike) as in some Amphibia. Am- phicoelous or biconcave vertebrae, however, predominate in all groups of fishes. Centra are wanting in Fig. 136.—Sagittal section of Sqaulas the Dipnoi, vertebrae, cut surfaces obliquely lined. ^-^j^ ^-^^ amphibians, bone c, calcifications of centra; cd, caudmeurals; _ ^ cdh, caudihemals; cr{i), cranineurals SUCCecds cartilage; and the VCrte- (intercalaria); d exits of dorsal nerve roots; ^^^^ ^^^ differentiated intO Cervical, crh, cranihemals; n, notochord; v, exits or ventral nerve roots. (From Kingsley's trunk, Sacral, and caudal. The "Comparative Anatomy of ;) ^-^g^^ ^^^^^^ vertebra is but slightly modified for attachment to the pelvic girdle. A single atlas represents the cervical series of higher forms. Zygapophyses, for articulating each vertebra with its two neighbors, first appear in this group. Articulation. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son & Co.
Size: 2074px × 1205px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublisherphi, booksubjectanatomycomparative
