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Related Concept Videos

Sperm Transport01:15

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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.
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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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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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Sperm Structure and Semen Composition01:22

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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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Fertilization01:38

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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...
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Testes: Histology01:27

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A tough, fibrous membrane, the tunica albuginea, covers the testes, extending inward to form fibrous partitions or septa, dividing them into internal compartments called lobules. Each lobule has 1 to 3 tightly coiled seminiferous tubules where sperm production occurs. These tubules merge into a tubular network at the back of the testis, known as the rete testis. It connects to 15 to 20 efferent ductules, leading to the epididymis.
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Related Experiment Video

Updated: Apr 21, 2026

Analysis of Epididymal Protein Synthesis and Secretion
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Analysis of Epididymal Protein Synthesis and Secretion

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Sperm dynamics in tubular confinement.

Veronika Magdanz1, Britta Koch, Samuel Sanchez

  • 1Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research, Helmholtzstr. 20, 01069, Dresden, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|October 31, 2014
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic chip to analyze sperm movement in confined spaces. Sperm can successfully travel through microtubes with diameters between 20-45 micrometers.

Keywords:
microchannelsmicrotubesmotile cellsspacial confinementsperm migration

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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:

  • Biomedical Engineering
  • Reproductive Biology
  • Microfluidics

Background:

  • Sperm motility is crucial for natural fertilization.
  • Understanding sperm behavior in confined environments is essential for reproductive health research.
  • Existing methods may not accurately replicate in vivo microenvironments.

Purpose of the Study:

  • To develop and utilize an on-chip system that mimics tubular microenvironments for studying spermatozoa motion.
  • To investigate the impact of microtube diameter on sperm velocity, directionality, and linearity.
  • To assess the feasibility of sperm migration through defined tubular channels.

Main Methods:

  • Fabrication of rolled-up silicon oxide/dioxide microtubes to create confined tubular environments.
  • Utilizing the on-chip system to observe and quantify spermatozoa motion.
  • Analyzing sperm parameters such as velocity, directionality, and linearity within microtubes of varying diameters (20-45 μm).

Main Results:

  • The on-chip system successfully mimics tubular microenvironments for sperm analysis.
  • Spermatozoa exhibited measurable motion within the microfabricated channels.
  • Tubular microenvironments with diameters ranging from 20 to 45 μm were found to facilitate sperm migration.

Conclusions:

  • The developed on-chip system provides a novel platform for studying sperm behavior under confinement.
  • Microtube diameter significantly influences sperm motility parameters.
  • This technology can advance the understanding of sperm transport and fertilization processes.