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Home page | TAH partonomy |
Top level | systema digestorium Short Extended |
Level 2 | intestinum crassum Short Extended |
Current level | canalis analis |
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16026 |
Around the anus, a thin layer of smooth muscle fibres radiates from the orifice. By its contraction it raises the skin into ridges around the margin of the anus (Shafik 1976 Invest Urol 13:271-277).
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Date: 29.07.2024 |