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Related Concept Videos

Sperm Structure and Semen Composition01:22

Sperm Structure and Semen Composition

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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The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
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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 reproductive...

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Related Experiment Video

Updated: May 20, 2026

Sperm Collection of Differential Quality Using Density Gradient Centrifugation
03:28

Sperm Collection of Differential Quality Using Density Gradient Centrifugation

Published on: November 29, 2018

Seminal plasma and its effect on ruminant spermatozoa during processing.

T Leahy1, S P de Graaf

  • 1Faculty of Science, School of Veterinary Science, University of Queensland, Gatton, QLD, Australia. t.leahy@uq.edu.au

Reproduction in Domestic Animals = Zuchthygiene
|July 26, 2012
PubMed
Summary

Seminal plasma

Area of Science:

  • Reproductive biology
  • Biochemistry

Background:

  • Seminal plasma's role in sperm function is complex, with both inhibitory and stimulatory effects.
  • Sperm membrane-associated proteins are key mediators of seminal plasma's influence.
  • In vitro sperm handling for artificial insemination can damage sperm by altering surface proteins and reducing seminal plasma.

Purpose of the Study:

  • To investigate the protective role of seminal plasma during in vitro sperm processing.
  • To explore species-specific differences in seminal plasma's effects on sperm.
  • To elucidate the influence of seminal plasma proteins, particularly BSP proteins, on sperm function and protection.

Main Methods:

  • Review of existing literature on seminal plasma composition and function.
  • Analysis of sperm handling procedures and their impact on sperm membrane proteins.

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Fluorimetric Techniques for the Assessment of Sperm Membranes
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Last Updated: May 20, 2026

Sperm Collection of Differential Quality Using Density Gradient Centrifugation
03:28

Sperm Collection of Differential Quality Using Density Gradient Centrifugation

Published on: November 29, 2018

Collection of Post-mating Semen from the Female Reproductive Tract and Measurement of Semen Liquefaction in Mice
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Collection of Post-mating Semen from the Female Reproductive Tract and Measurement of Semen Liquefaction in Mice

Published on: November 18, 2017

Fluorimetric Techniques for the Assessment of Sperm Membranes
08:58

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

  • Comparative assessment of seminal plasma effects in different species (e.g., ram vs. bull).

    • Main Results:

    • Seminal plasma can protect sperm during in vitro handling, but its effectiveness varies by species.
    • Ram spermatozoa benefit from seminal plasma during processing, while bull spermatozoa do not show similar protection.
    • Differences in protection are linked to seminal plasma protein composition, especially Bulkspecific proteins (BSPs).

    Conclusions:

    • Seminal plasma's protective capacity during in vitro sperm processing is species-dependent.
    • Bulkspecific proteins (BSPs) play a significant role in the protective mechanisms of seminal plasma.
    • Understanding these mechanisms can improve sperm preservation and artificial insemination techniques.