Anterior view of aortic arch anomaly where right and left aortic arches persist completely, as in the frog, forming an aortic ring through which pass the esophagus and trachea.

Posterior view of the posterior longitudinal ligament; pedicles have been sawn through.

Transverse section through superior mediastinum superior to (above) the aortic arch.

Transverse section through superior mediastinum at the level of the aortic arch.

Flower, Watercolor painting of beauty in nature

Median section (through the dens) in the area of the atlanto-occipital and atlantoaxial joints.

Architecture - Italy - line art Detail Through arch. A section through an arch in the Palazzo Lante, Piazza Della Caprettari.

Architecture - Italy - line art Perspective Illustration Renaissance A view through to the courtyard of the Palazzo Parracciani. The Renaissance -- the revival of arts and literature under the influence of classical (Greek & Roman) models in the 14th - 1

Budapest through Stone Arches