• 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