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Stereocilia of frog inner ear
Anatomical terms of microanatomy

Stereocilia (or stereovilli) are non-motile apical modifications of the cell. They are distinct from cilia and microvilli, but closely related to the latter.

In structure, they are much longer and thicker than typical microvilli, form single "finger-like" projections that may be branched, and have more of the characteristics of the cellular membrane proper. Like microvilli, they contain actin filaments and lack an axoneme, distinguishing them from cilia.

They are found in three regions of the body:

Stereocilia have some basic characteristics :-

  • Basal granules are absent
  • Non-motile
  • Cylindrical
  • May or may not be covered by a glycocalyx
  • Have no fixed arrangement as is present in Kinocilium


  1. ^ Krause J. William (July 2005). Krause's Essential Human Histology for Medical Students. Universal-Publishers. p. 37. ISBN 978-1-58112-468-2.
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