Anatomy|A|338771
Organisms|B|240167
Diseases|C|468134
Chemicals and Drugs|D|891453
Analytical, Diagnostic and Therapeutic Techniques and Equipment|E|738192
Psychiatry and Psychology|F|146008
Biological Sciences|G|882040
Physical Sciences|H|306561
Anthropology, Education, Sociology and Social Phenomena|I|88294
Technology and Food and Beverages|J|32673
Humanities|K|21364
Information Science|L|83444
Persons|M|339209
Health Care|N|424433
Geographic Locations|Z|77112

Body Regions|A01|16577
Musculoskeletal System|A02|31941
Digestive System|A03|18650
Respiratory System|A04|7504
Urogenital System|A05|18179
Endocrine System|A06|8288
Cardiovascular System|A07|29158
Nervous System|A08|60959
Sense Organs|A09|9694
Tissues|A10|31906
Cells|A11|139518
Fluids and Secretions|A12|9622
Animal Structures|A13|4668
Stomatognathic System|A14|10432
Hemic and Immune Systems|A15|36736
Embryonic Structures|A16|9450
Invertebrates|B01|19896
Vertebrates|B02|144853
Bacteria|B03|29312
Viruses|B04|19922
Algae and Fungi|B05|9123
Plants|B06|21375
Archaea|B07|834
Bacterial Infections and Mycoses|C01|28374
Virus Diseases|C02|20513
Parasitic Diseases|C03|7383
Neoplasms|C04|99942
Musculoskeletal Diseases|C05|19832
Digestive System Diseases|C06|37982
Stomatognathic Diseases|C07|11937
Respiratory Tract Diseases|C08|23393
Otorhinolaryngologic Diseases|C09|6847
Nervous System Diseases|C10|60284
Eye Diseases|C11|12039
Urologic and Male Genital Diseases|C12|19853
Female Genital Diseases and Pregnancy Complications|C13|17880
Cardiovascular Diseases|C14|58098
Hemic and Lymphatic Diseases|C15|16388
Congenital, Hereditary, and Neonatal Diseases and Abnormalities|C16|22629
Skin and Connective Tissue Diseases|C17|18623
Nutritional and Metabolic Diseases|C18|23991
Endocrine Diseases|C19|23793
Immunologic Diseases|C20|31216
Disorders of Environmental Origin|C21|26097
Animal Diseases|C22|12379
Pathological Conditions, Signs and Symptoms|C23|101853
Inorganic Chemicals|D01|61350
Organic Chemicals|D02|95734
Heterocyclic Compounds|D03|60123
Polycyclic Hydrocarbons|D04|24185
Environmental Pollutants, Noxae, and Pesticides|D05|14766
Hormones, Hormone Substitutes, and Hormone Antagonists|D06|30350
Reproductive Control Agents|D07|2376
Enzymes, Coenzymes, and Enzyme Inhibitors|D08|104130
Carbohydrates and Hypoglycemic Agents|D09|34993
Lipids and Antilipemic Agents|D10|32856
Growth Substances, Pigments, and Vitamins|D11|20691
Amino Acids, Peptides, and Proteins|D12|270317
Nucleic Acids, Nucleotides, and Nucleosides|D13|67587
Neurotransmitters and Neurotransmitter Agents|D14|36689
Central Nervous System Agents|D15|12983
Peripheral Nervous System Agents|D16|5522
Anti-Inflammatory Agents, Antirheumatic Agents, and Inflammation Mediators|D17|13161
Cardiovascular Agents|D18|7905
Hematologic, Gastrointestinal, and Renal Agents|D19|5849
Anti-Infective Agents|D20|16467
Anti-Allergic and Respiratory System Agents|D21|1496
Antineoplastic and Immunosuppressive Agents|D22|13633
Dermatologic Agents|D23|1033
Immunologic and Biological Factors|D24|131858
Biomedical and Dental Materials|D25|13594
Specialty Chemicals and Products|D26|50305
Chemical Actions and Uses|D27|127757
Diagnosis|E01|173694
Therapeutics|E02|78294
Anesthesia and Analgesia|E03|4656
Surgical Procedures, Operative|E04|71319
Investigative Techniques|E05|450855
Dentistry|E06|13179
Equipment and Supplies|E07|22867
Behavior and Behavior Mechanisms|F01|66371
Psychological Phenomena and Processes|F02|42727
Mental Disorders|F03|26321
Behavioral Disciplines and Activities|F04|18494
Biological Sciences|G01|20039
Health Occupations|G02|26188
Environment and Public Health|G03|285875
Biological Phenomena, Cell Phenomena, and Immunity|G04|97551
Genetics|G05|213117
Biochemical Phenomena, Metabolism, and Nutrition|G06|185458
Physiological Processes|G07|55824
Reproductive and Urinary Physiology|G08|31245
Circulatory and Respiratory Physiology|G09|34972
Digestive, Oral, and Skin Physiology|G10|5587
Musculoskeletal, Neural, and Ocular Physiology|G11|62506
Chemical and Pharmacologic Phenomena|G12|41441
Natural Sciences|H01|306561
Social Sciences|I01|61170
Education|I02|18758
Human Activities|I03|8461
Technology, Industry, and Agriculture|J01|17713
Food and Beverages|J02|14960
Humanities|K01|21364
Information Science|L01|83444
Persons|M01|339209
Population Characteristics|N01|49645
Health Care Facilities, Manpower, and Services|N02|59815
Health Care Economics and Organizations|N03|48729
Health Services Administration|N04|81569
Health Care Quality, Access, and Evaluation|N05|257312
Geographic Locations|Z01|77112