- CodeDescription
- B0 Central Nervous System
- B2 Heart
- B3 Upper Arteries
- B4 Lower Arteries
- B5 Veins
- B7 Lymphatic System
- B8 Eye
- B9 Ear, Nose, Mouth and Throat
- BB Respiratory System
- BD Gastrointestinal System
- BF Hepatobiliary System and Pancreas
- BG Endocrine System
- BH Skin, Subcutaneous Tissue and Breast
- BL Connective Tissue
- BN Skull and Facial Bones
- BP Non-Axial Upper Bones
- BQ Non-Axial Lower Bones
- BR Axial Skeleton, Except Skull and Facial Bones
- BT Urinary System
- BU Female Reproductive System
- BV Male Reproductive System
- BW Anatomical Regions
- BY Fetus and Obstetrical