| Name: | hemal arch |
|---|---|
| Synonyms: | haemal arch, ventral arcocentrum |
| Definition: | 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. |
| Ontology: | Anatomy Ontology [ZFA:0000519] |
| Name: | decreased volume |
|---|---|
| Synonyms: | low volume, small volume |
| Definition: | A volume which is relatively low. |
| Ontology: | Phenotypic Quality Ontology [PATO:0000596] |