| Label | Id | |
|---|---|---|
| outer ear | http://purl.obolibrary.org/obo/MAT_0000147 | |
| ovarian follicle | http://purl.obolibrary.org/obo/MAT_0000449 | |
| ovary - animal | http://purl.obolibrary.org/obo/MAT_0000125 | |
| ovary follicle | http://purl.obolibrary.org/obo/MAT_0000449 | |
| ovary - plant | http://purl.obolibrary.org/obo/MAT_0000517 | |
| oviduct | http://purl.obolibrary.org/obo/MAT_0000126 | |
| ovum | http://purl.obolibrary.org/obo/MAT_0000213 | |
| palate - human | http://purl.obolibrary.org/obo/MAT_0000161 | |
| palatine tonsil | http://purl.obolibrary.org/obo/MAT_0000291 | |
| pancreas | http://purl.obolibrary.org/obo/MAT_0000075 | |
| pancreatic islet | http://purl.obolibrary.org/obo/MAT_0000076 | |
| parasympathetic nervous system | http://purl.obolibrary.org/obo/MAT_0000101 | |
| parathyroid | http://purl.obolibrary.org/obo/MAT_0000082 | |
| parathyroid secreting cell | http://purl.obolibrary.org/obo/MAT_0000082 | |
| parietal lobe | http://purl.obolibrary.org/obo/MAT_0000506 |