Name: | hemal arch |
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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: | hypoplastic |
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Synonyms: | hypoplasia, underdeveloped |
Definition: | A physical quality inhering in an organ or tissue by virtue of the bearer's exhibiting a decreased number of cells, typically associated with a decrease in size. |
Ontology: | Phenotypic Quality Ontology [PATO:0000645] |