All

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 A07 Cardiovascular System D002319 +
  A07.541 Heart D006321 +
   A07.541.278 Fetal Heart D005318 +
    A07.541.278.930 Truncus Arteriosus D014338 
 A16 Embryonic Structures D004628 +
  A16.378 Fetus D005333 +
   A16.378.303 Fetal Heart D005318 +
    A16.378.303.930 Truncus Arteriosus D014338