| B - Organisms 
 | Deleted term |  | Concept absorbed by | 
 
 | 
| B01 - Eukaryota 
 B05 - Organism Forms
 
 
 
 
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| C - Diseases 
 | Deleted term |  | Concept absorbed by | 
 
 | 
| C14 - Cardiovascular Diseases 
 C06 - Digestive System Diseases
 
 C20 - Immune System Diseases
 
 C21 - Disorders of Environmental Origin
 
 C03 - Parasitic Diseases
 
 C17 - Skin and Connective Tissue Diseases
 
 
 
 
 | 
| D - Chemicals and Drugs 
 | Deleted term |  | Concept absorbed by | 
 
 | 
| D12 - Amino Acids, Peptides, and Proteins 
 D27 - Chemical Actions and Uses
 
 D08 - Enzymes and Coenzymes
 
 
 
 
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| H - Disciplines and Occupations 
 | Deleted term |  | Concept absorbed by | 
 
 | 
| H02 - Health Occupations 
 
 
 
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| SP - Public Health 
 | Deleted term |  | Concept absorbed by | 
 
 | 
| SP8 - Disasters 
 SP4 - Environmental Health
 
 
 
 
 |