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| Home page | TAH partonomy | 
| Top level | 
                sensory organs   Short Extended
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| Level 2 | 
                visual organ (pair)   Short Extended
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| Current level | 
                fibrous layer of eyeball (pair)   Extended
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              Partonomy list
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              Scientific notes
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| UID | 
                 
                  Libelle of note
                 
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| 6891 | 
                 
                  The Tunica fibrosa has been subdivided into the Sclera, the Cornea and the Limbus corneae, a transitional zone between sclera and cornea, of utmost importance for the maintenance of intra-ocular pressure, since the removal of aqueous humor occurs here. The terminology used follows Hogan MJ, Alvarado JA, Weddell JE (1971) Histology of the Human Eye. Saunders, Philadelphia, PA.
                 
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| 6904 | 
                 
                  New term; the Venulae aquosae ('Wasservenen') were described by Ascher KW (1942) Am J Ophthalmol 25:31. They collect the Humor aquosus from the Sinus venosus sclerae, and drain into the Venae episclerales.
                 
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              Signature
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| Type of list | P3 | 
| List Unit Identifier | 6891 | 
| Sublist 1 | 6892 sclera 26/9 on 7.4.2018 | 
| Sublist 2 | 6902 cornea 41/14 on 7.4.2018 | 
| Sublist 3 | 6904 limbus corneae 25/10 on 7.4.2018 | 
| Subtotals | subchildren 92 subunits 33 | 
| Proper children | 5 | 
| Number of children | 97 (validated) | 
| Proper units | 1 | 
| Number of units | 34 (validated) | 
| Signature | 21005 (validated since 11.5.2018) | 
| Date: 25.06.2025 |