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              Identification
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| Official Latin term | 
                tractus substantiae  
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| Official subsidiary term | 
                tract of matter  
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| Unit identifier | TAH:U18877 | 
| Unit type | taxonomic | 
| Materiality | material | 
               
              Navigation
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              Taxonomic definition
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| Taxonomic definition | 
                A tract of matter    is a subdivision of system of organs   [divisio systematis organorum  ] which is an ordered sequence of organs [organum  ] that leads from an initial point to an exit point a portion of substance [portio substantiae  ].
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              Taxonomy
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| FMA:62955 | |
| FMA:61775 | |
| FMA:67165 | |
| FMA:305751 | |
| FMA:67135 | |
| FMA:67509 | |
| TAH:G18877 | 
                 tractus substantiae  
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| TAH16396 | 
| TAH18883 | |
| TAH16484 | 
| TAH16397 | 
| TAH10389 | 
| TAH16398 | 
| TAH18926 | |
| TAH16460 | |
| TAH18884 | |
| TAH18938 | 
| Total | 
                 
                  10 children
                 
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| Date: 02.11.2025 |