| (subclass VitalOrgan Organ) | Mid-level-ontology.kif 11830-11830 | Vital organ is a subclass of organ |
| (subclass Lung VitalOrgan) | Mid-level-ontology.kif 11186-11186 | Lung is a subclass of vital organ |
| (subclass Kidney VitalOrgan) | Mid-level-ontology.kif 11266-11266 | Kidney is a subclass of vital organ |
| (subclass Heart VitalOrgan) | Mid-level-ontology.kif 11335-11335 | Heart is a subclass of vital organ |
| (subclass Liver VitalOrgan) | Mid-level-ontology.kif 11416-11416 | Liver is a subclass of vital organ |
| (subclass Brain VitalOrgan) | Mid-level-ontology.kif 11846-11846 | Brain is a subclass of vital organ |
| (subclass Gills VitalOrgan) | Medicine.kif 266-266 | Gills is a subclass of vital organ |
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