Annulus (skin)

As annuluses (singular: annulus of lat. Annulus: Ring) refers to skin wrinkles, which run around the body completely or partially. The annuli create a curl, for example in the annelids and sneak amphibians . A distinction is made between primary, secondary and tertiary annuli in vertebrates . Primary annuli run over the vertebrae and their connective tissue plates ( myosepta ), secondary and tertiary annuli run between the myosepta.

Individual evidence

↑ Volker Storch, Ulrich Welsch: Kükenthal - zoological internship. , Spektrum Akademischer Verlag, 2009, ISBN 978-3827419989 , p. 318.
↑ Wilfried Westheide, Gunde Rieger, Reinhard Riege: Special Zoology Part 2: Vertebrate or skull animals. Spektrum Akademischer Verlag, 2009, ISBN 978-3827420398 , p. 338.

[Kükenthal-1] Volker Storch, Ulrich Welsch: Kükenthal - zoological internship. , Spektrum Akademischer Verlag, 2009, ISBN 978-3827419989 , p. 318.

[Spezielle_Zoologie2-2] Wilfried Westheide, Gunde Rieger, Reinhard Riege: Special Zoology Part 2: Vertebrate or skull animals. Spektrum Akademischer Verlag, 2009, ISBN 978-3827420398 , p. 338.