| epiblast | http://purl.obolibrary.org/obo/MAT_0000067 | epiblast | |
| epicranial plate | http://purl.obolibrary.org/obo/MAT_0000017 | craniofacial tissue | |
| epidermis | http://purl.obolibrary.org/obo/MAT_0000154 | epidermis | |
| epididymus | http://purl.obolibrary.org/obo/MAT_0000130 | epididymus | |
| epithalamus | http://purl.obolibrary.org/obo/MAT_0000422 | epithalamus | |
| epithelial system - sensu C elegans | http://purl.obolibrary.org/obo/MAT_0000033 | integumental system | |
| esophagus | http://purl.obolibrary.org/obo/MAT_0000048 | oesophagus | |
| eubacterium | http://purl.obolibrary.org/obo/MAT_0000191 | eubacterium | |
| eVOC CV (EV) | http://purl.obolibrary.org/obo/MAT_0000426 | eVOC CV (EV) | |
| eVOC human development stage (EV) | http://purl.obolibrary.org/obo/MAT_0000435 | eVOC human development stage (EV) | |
| eVOC mouse development stage (EVM) | http://purl.obolibrary.org/obo/MAT_0000436 | eVOC mouse development stage (EVM) | |
| excretory canal | http://purl.obolibrary.org/obo/MAT_0000119 | kidney | |
| excretory duct | http://purl.obolibrary.org/obo/MAT_0000120 | ureter | |
| excretory duct | http://purl.obolibrary.org/obo/MAT_0000121 | urethra | |
| excretory duct cell | http://purl.obolibrary.org/obo/MAT_0000120 | ureter | |
| excretory system | http://purl.obolibrary.org/obo/MAT_0000027 | renal system | |
| exocrine system | http://purl.obolibrary.org/obo/MAT_0000021 | gland | |
| exoskeleton | http://purl.obolibrary.org/obo/MAT_0000150 | exoskeleton | |
| external carotid artery | http://purl.obolibrary.org/obo/MAT_0000501 | carotid artery | |
| external ear | http://purl.obolibrary.org/obo/MAT_0000147 | outer ear | |
| external gill | http://purl.obolibrary.org/obo/MAT_0000134 | gill | |
| extraembryonic component | http://purl.obolibrary.org/obo/MAT_0000061 | extraembryonic tissue | |
| extraembryonic structure | http://purl.obolibrary.org/obo/MAT_0000061 | extraembryonic tissue | |
| extraembryonic tissue | http://purl.obolibrary.org/obo/MAT_0000061 | extraembryonic tissue | |
| eye | http://purl.obolibrary.org/obo/MAT_0000140 | eye | |
| eyeball | http://purl.obolibrary.org/obo/MAT_0000283 | eyeball | |
| eyes | http://purl.obolibrary.org/obo/MAT_0000140 | eye | |
| faeces | http://purl.obolibrary.org/obo/MAT_0000053 | faeces | |
| fallopian tube | http://purl.obolibrary.org/obo/MAT_0000126 | oviduct | |
| fascia | http://purl.obolibrary.org/obo/MAT_0000301 | connective tissue | |