| Fat_bodies | http://purl.obolibrary.org/obo/MAT_0000456 | fat body sensu amphibia | |
| fat body sensu amphibia | http://purl.obolibrary.org/obo/MAT_0000456 | fat body sensu amphibia | |
| fat body sensu invertebrata | http://purl.obolibrary.org/obo/MAT_0000096 | fat body sensu invertebrata | |
| fat tissue | http://purl.obolibrary.org/obo/MAT_0000015 | fat tissue | |
| feather | http://purl.obolibrary.org/obo/MAT_0000156 | feather | |
| female | http://purl.obolibrary.org/obo/MAT_0000028 | reproductive system - female | |
| female gamete | http://purl.obolibrary.org/obo/MAT_0000124 | egg - unfertilized | |
| female genitalia | http://purl.obolibrary.org/obo/MAT_0000028 | reproductive system - female | |
| female genital system | http://purl.obolibrary.org/obo/MAT_0000028 | reproductive system - female | |
| female inflorescence | http://purl.obolibrary.org/obo/MAT_0000317 | female inflorescence | |
| female reproductive system | http://purl.obolibrary.org/obo/MAT_0000028 | reproductive system - female | |
| fertilized egg stage | http://purl.obolibrary.org/obo/MAT_0000074 | fertilized egg stage | |
| fetilized egg | http://purl.obolibrary.org/obo/MAT_0000528 | fetilized egg | |
| fetus | http://purl.obolibrary.org/obo/MAT_0000399 | embryo late (growth) stage | |
| fin | http://purl.obolibrary.org/obo/MAT_0000087 | fin | |
| fin bud | http://purl.obolibrary.org/obo/MAT_0000062 | fin bud | |
| fins | http://purl.obolibrary.org/obo/MAT_0000087 | fin | |
| fission yeast | http://purl.obolibrary.org/obo/MAT_0000437 | fission yeast | |
| flower | http://purl.obolibrary.org/obo/MAT_0000231 | flower | |
| flower development stages | http://purl.obolibrary.org/obo/MAT_0000410 | flower development stages | |
| flowering stage | http://purl.obolibrary.org/obo/MAT_0000410 | flower development stages | |
| fluid - animal | http://purl.obolibrary.org/obo/MAT_0000020 | fluid - animal | |
| fluid - plant | http://purl.obolibrary.org/obo/MAT_0000347 | fluid - plant | |
| foot | http://purl.obolibrary.org/obo/MAT_0000091 | autopod | |
| forebrain | http://purl.obolibrary.org/obo/MAT_0000105 | forebrain | |
| forelimb | http://purl.obolibrary.org/obo/MAT_0000394 | forelimb | |
| forelimb digit | http://purl.obolibrary.org/obo/MAT_0000285 | digit | |
| frontal lobe | http://purl.obolibrary.org/obo/MAT_0000505 | frontal lobe | |
| fruit | http://purl.obolibrary.org/obo/MAT_0000232 | fruit | |
| fruit development stages | http://purl.obolibrary.org/obo/MAT_0000411 | fruit development stages | |