is_part_of_system
Use it like this:
- [ #is/_part_of_system :: AnatomicalSystem ] or
- [ is_part_of_system :: AnatomicalSystem ]
The anatomical or organ system that this structure is part of.
Relation describes that: [ #has_/domain :: AnatomicalStructure ] ( #has_/name :: is_part_of_system ) ( #has_/range :: AnatomicalSystem )