Maturation phase
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Manchette migrate towards the tail and begin to disappear.
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Mitochondria are assembled around flagellum to form the middle piece.
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Dense outer fibres form around the flagellum.
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Post-nuclear cap is formed from manchette microtubules.
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Annulus forms the juncture between the middle piece and principal piece.
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During later stages of spermiogenesis, sertoli cells forms the cytoplasm remaining after elongation of spermatid into a spheroidal lobule called residual body.
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Lobule of cytoplasm is connected to the elongated spermatid by a slender thread cytoplasm and is inter connected with other residual bodies by intercellular bridges.
Formation of residual bodies completes final maturation and spermatids are ready for release.
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- Sertoli cells also remove degenerating germ cells.
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Last modified: Tuesday, 12 June 2012, 4:29 AM