| acquired abnormality | T020 | | |
| activity | T052 | | |
| age group | T100 | | |
| alga | T003 | | |
| amino acid | T116 | | |
| amino acid, peptide, or protein | T116 | | |
| amino acid sequence | T087 | | |
| amphibian | T011 | | |
| anatomical abnormality | T190 | | |
| anatomical structure | T017 | | |
| animal | T008 | | |
| antibiotic | T195 | | |
| archaeon | T194 | | |
| bacterium | T007 | | |
| behavior | T053 | | |
| biogenic anime | T124 | | |
| biologically active substance | T123 | | |
| biologic function | T038 | | |
| biomedical occupation or discipline | T091 | | |
| biomedical or dental material | T122 | | |
| bird | T012 | | |
| body location | T029 | | |
| body location or region | T029 | | |
| body part | T023 | | |
| body part, organ, or organ component | T023 | | |
| body region | T029 | | |
| body space | T030 | | |
| body space or junction | T030 | | |
| body substance | T031 | | |
| body system | T022 | | |
