A vertebral arch that is attached to the ventral surface or the vertebral centrum and encloses and protects the caudal artery and vein ventrally. [ AAO:0000726 http://orcid.org/0000-0002-6601-2165 http://en.wikipedia.org/wiki/Haemal_arch ]
Synonyms: haemal arch ventral arcocentrum
Term information
- TAO:0000519
- AAO:0000726
- Wikipedia:Haemal_arch
- ZFA:0000519
Hemal arches extend ventrally from the centra of caudal and transitional vertebrae to enclose the caudal artery and vein. In cyprinids, the hemal arch forms directly in membrane bone.[TAO]
Bony canal attached to the ventral surface or the vertebral centrum that encloses and protects the caudal artery and vein ventrally. The arch consists of right and left halves, which are fused ventrally to give a V- or Y-shape to the ventral aspect of the vertebra.[AAO]
fish, most reptiles, some birds, and some mammals with long tails.
In cyprinids, the hemal arch forms directly in membrane bone[ZFA]