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Related Concept Videos

Centrioles and Centrosomes01:13

Centrioles and Centrosomes

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Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
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Centrosome Duplication02:25

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The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
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Spermatogenesis01:41

Spermatogenesis

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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
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Spermatogenesis01:22

Spermatogenesis

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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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The Mitotic Spindle02:27

The Mitotic Spindle

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The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed during cell division, the spindle separates sister chromatids and moves them to opposite ends of a parental cell, where the now individual chromosomes are distributed to two daughter cell nuclei.
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Sperm Structure and Semen Composition01:22

Sperm Structure and Semen Composition

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During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
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Related Experiment Video

Updated: Dec 11, 2025

Imaging Centrosomes in Fly Testes
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Imaging Centrosomes in Fly Testes

Published on: September 20, 2013

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The sperm centrioles.

Tomer Avidor-Reiss1, Alexa Carr2, Emily Lillian Fishman3

  • 1Department of Biological Sciences, College of Natural Sciences and Mathematics, University of Toledo, Toledo, OH, USA; Department of Urology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH, USA.

Molecular and Cellular Endocrinology
|August 19, 2020
PubMed
Summary

Sperm centrioles have unique roles beyond basic cell functions, including orchestrating cell divisions, forming flagella, and initiating embryogenesis after fertilization. These specialized structures are vital for sperm function and early development.

Keywords:
AndrologyCentrioleMale infertilitySemenSperm

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A Seminiferous Tubule Squash Technique for the Cytological Analysis of Spermatogenesis Using the Mouse Model
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Area of Science:

  • Cell Biology
  • Reproductive Biology
  • Developmental Biology

Background:

  • Centrioles are crucial subcellular structures involved in cytoskeleton organization, centrosome and cilia formation, and cell division.
  • Sperm centrioles possess unique characteristics, such as structural remodeling and migration, not seen in other cell types.

Purpose of the Study:

  • To discuss five key roles of sperm centrioles in spermatogenesis and post-fertilization events.
  • To review the historical discovery of centrioles as embryogenesis initiators.
  • To examine evidence linking sperm centriole functions to clinical phenotypes.

Main Methods:

  • Literature review of historical discoveries and recent genetic studies in humans and mammals.
  • Analysis of the specialized functions of sperm centrioles during meiosis and fertilization.

Main Results:

  • Sperm centrioles orchestrate spermatogenic cell divisions and form spermatozoon flagella.
  • They link sperm head and tail, control tail beating, and organize the zygote cytoskeleton post-fertilization.
  • Evidence links sperm centriole functions to specific clinical conditions.

Conclusions:

  • Sperm centrioles are essential for male fertility and embryonic development, exhibiting diverse and specialized functions.
  • Further research is needed to fully understand the complexity of sperm centriole roles and their clinical implications.