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The atlas, viewed from above.

Atlas

The atlas, viewed from above.

First cervical vertebra, or atlas.

Atlas

First cervical vertebra, or atlas.

The atlas from above. Labels: 1, posterior arch; 2, transverse process; 3, tubercle for transverse ligament; 4, anterior arch; 5, anterior tubercle; 6, surface for articulation with odontoid process; 7, superior articular process; 8, foramen for vertebral artery; 9, groove for vertebral artery; 10, posterior tubercle.

Atlas from Above

The atlas from above. Labels: 1, posterior arch; 2, transverse process; 3, tubercle for transverse ligament;…

Second cervical vertebra, or axis.

Axis

Second cervical vertebra, or axis.

The axis from behind and above.

Axis from Above

The axis from behind and above.

The axis from left side.

Axis from Side

The axis from left side.

A cervical vertebra. Labels: Frt, vertebral foramen; Pai, anterior articular process; R, rudimentary rib.

A Cervical Vertebra

A cervical vertebra. Labels: Frt, vertebral foramen; Pai, anterior articular process; R, rudimentary…

Fourth cervical vertebra from above.

Fourth Cervical from Above

Fourth cervical vertebra from above.

Right lateral view of a cervical vertebra of a horse. Labels: 1, neural spine; 2, anterior oblique processes; 3, posterior oblique processes; 5, convex anterior end, and 9, concave posterior end of the centrum; 6, anterior ends of transverse processes; and 7, posterior end of right one; 8, inferior process, or hypapophsis.

Cervical Vertebra of a Horse

Right lateral view of a cervical vertebra of a horse. Labels: 1, neural spine; 2, anterior oblique processes;…

Fourth cervical vertebra viewed from above.

Fourth Cervical Vertebra Viewed from Above

Fourth cervical vertebra viewed from above.

Fourth cervical vertebra viewed from right side.

Fourth Cervical Vertebra Viewed from Side

Fourth cervical vertebra viewed from right side.

A cervical vertebra viewed from above.

Cervical Vertebra

A cervical vertebra viewed from above.

Cervical vertebra.

Cervical Vertebra

Cervical vertebra.

Fourth cervical vertebra from in front.

Front View of Fourth Cervical

Fourth cervical vertebra from in front.

Fourth cervical vertebra from the side.

Side View of Fourth Cervical

Fourth cervical vertebra from the side.

Right lateral view of the cervical portion of the vertebral column of a horse. 1 to 7, the seven segments; 1, the atlas-a, its wing-S, internal foramen of alar gutter-9, posterior foramen of wing; 2, the dentata-11, neural spine; 12, transverse process; 13, centrum; 14, foramen corresponding to intervertebral foramen; 10, atlo-axoid space; the odontoid process is seen below the figures; 15, zygapophyses, or olbique processes; 16, centra, or bodies, in situ- 17, hypapophyses, or inferior processes-b, transverse processes-c, trifid transverse process of sixth vertebra-d, transverse process of seventh.

Horse Vertebral Column

Right lateral view of the cervical portion of the vertebral column of a horse. 1 to 7, the seven segments;…