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Related Concept Videos

Spermatogenesis01:41

Spermatogenesis

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...
Fertilization01:38

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
Spermatogenesis01:22

Spermatogenesis

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.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
Sperm Transport01:15

Sperm Transport

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...
Accessory Glands of the Male Reproductive System01:16

Accessory Glands of the Male Reproductive System

The accessory ducts involved in sperm maturation and transportation include the epididymides, vasa deferentia, ejaculatory ducts, and urethra. These ducts play a critical role in the maturation, storage, and transportation of sperm from the testes to the urethra, where it is then released during ejaculation.
The epididymis is a small, comma-shaped organ located at the back of each testicle. The epididymis can be divided into three main parts: the head, body, and tail. The head of the epididymis...
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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Biology of male fertility control: an overview of various male contraceptive approaches.

Minerva ginecologica·2014
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Significance of egg's zona pellucida glycoproteins in sperm-egg interaction and fertilization.

Minerva ginecologica·2014
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Molecular events that regulate mammalian fertilization.

Minerva ginecologica·2011
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Calmodulin signals capacitation and triggers the agonist-induced acrosome reaction in mouse spermatozoa.

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Mammalian sperm molecules that are potentially important in interaction with female genital tract and egg vestments.

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Carbohydrates mediate sperm-ovum adhesion and triggering of the acrosome reaction.

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Related Experiment Video

Updated: Jul 26, 2026

Fluorimetric Techniques for the Assessment of Sperm Membranes
08:58

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Mammalian sperm acrosome: formation, contents, and function.

A Abou-Haila1, D R Tulsiani

  • 1UFR Biomedicale, Université René Descartes, 45, Rue des Saints-Pères, Paris, 75270, France.

Archives of Biochemistry and Biophysics
|July 19, 2000
PubMed
Summary

Sperm-egg interaction relies on carbohydrate recognition for species-specific fertilization. The sperm acrosome

Area of Science:

  • Reproductive Biology
  • Cellular Biology
  • Biochemistry

Background:

  • Sperm-egg interaction is a crucial, species-specific event mediated by carbohydrates, initiating fertilization.
  • Fertilization involves sequential steps: sperm capacitation, binding to the zona pellucida (ZP), acrosome reaction, ZP penetration, and egg fusion.
  • The sperm acrosome, formed during spermatogenesis and modified in the epididymis, plays a vital role in fertilization.

Purpose of the Study:

  • To review the formation, modification, and function of the sperm acrosome in sperm-egg interaction.
  • To emphasize the molecular events during spermatogenesis leading to acrosome development.
  • To discuss the functional significance of acrosomal contents in fertilization.

Main Methods:

  • Review of existing literature on sperm development and fertilization mechanisms.

More Related Videos

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
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Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Real-Time Imaging of Acrosomal Calcium Dynamics and Exocytosis in Live Mouse Sperm
05:04

Real-Time Imaging of Acrosomal Calcium Dynamics and Exocytosis in Live Mouse Sperm

Published on: October 13, 2023

Related Experiment Videos

Last Updated: Jul 26, 2026

Fluorimetric Techniques for the Assessment of Sperm Membranes
08:58

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
05:44

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Real-Time Imaging of Acrosomal Calcium Dynamics and Exocytosis in Live Mouse Sperm
05:04

Real-Time Imaging of Acrosomal Calcium Dynamics and Exocytosis in Live Mouse Sperm

Published on: October 13, 2023

  • Focus on molecular events during spermatogenesis (mitosis, meiosis, spermiogenesis).
  • Analysis of carbohydrate-mediated sperm-egg binding and acrosome reaction induction.

    • Main Results:

    • Spermatogenesis transforms spermatids into spermatozoa with a developed acrosome.
    • Species-specific sperm-egg binding is mediated by carbohydrate-recognizing molecules on sperm and ZP glycans.
    • Binding triggers a calcium-dependent signal transduction pathway, activating the sperm and initiating the acrosome reaction.

    Conclusions:

    • The acrosome reaction, involving the release of hydrolytic enzymes, is essential for zona pellucida penetration.
    • Sperm-egg interaction is a complex, regulated process involving molecular recognition and signaling cascades.
    • Understanding acrosome function is key to comprehending successful fertilization.