hemal arches

he·mal arch·es

1. the arches that collectively comprise the thoracic cage, each consisting of a vertebra (body, pedicle, and transverse processes), the corresponding pair of ribs and their articular cartilages, and the portion of the sternum to which they attach.
2. three or four V-shaped bones located ventral to the bodies of the third to sixth coccygeal vertebrae; they represent intercentra and usually enclose the ventral caudal artery and vein.
References in periodicals archive ?
Monod proposed the fusion of preural centra 2 and 3 (PU2 + PU3) in another species of the same genus, Syngnathus acus, on the evidence of two hemal arches under the same vertebral centrum.
Hemal arches display a medium laminar shape in longitude and a bending back oriented position, which indicates that the anterior face, when inserted into the vertebrae, becomes lateral by the side of the arch.