part of part of hemal arch haemal arch lamina This class was sourced from an external ontology (amphibian_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon Paired plates that form the haemal arch. The lateral margin of each lamina is firmly attached to the ventral surface of the caudal vertebral centrum and the medial end fuses to the medial end of the opposite lamina. UBERON:3000727 skeletal element projection