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Related Concept Videos

Testes: Gross Anatomy01:19

Testes: Gross Anatomy

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The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
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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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Testosterone: Functions and Regulation01:26

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The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
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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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Anatomy of the Brain: Major Regions01:20

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The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
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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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Related Experiment Video

Updated: Nov 3, 2025

Isolation of Sertoli Cells and Peritubular Cells from Rat Testes
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Brain and testis: more alike than previously thought?

Bárbara Matos1, Stephen J Publicover2, Luis Filipe C Castro3,4

  • 1Laboratory of Signal Transduction, Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.

Open Biology
|June 1, 2021
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Human brain and testis share significant molecular and functional similarities, including common proteins and pathways involved in exocytosis. Further research into these connections may clarify tissue dysfunctions and improve therapeutic strategies.

Keywords:
brainmolecularneuronspermtestis

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Area of Science:

  • Neurobiology
  • Reproductive Biology
  • Comparative Genomics

Background:

  • Growing evidence suggests striking similarities between human brain and testis.
  • Previous studies have reported associations between intelligence and semen quality, and links between brain and testis dysfunctions.

Purpose of the Study:

  • To explore the molecular and functional similarities between human brain and testis.
  • To understand the implications of these similarities for speciation and disease.

Main Methods:

  • Comparative analysis of molecular features and protein expression.
  • Functional comparison of neurons and sperm.

Main Results:

  • Identified numerous common proteins shared between brain and testis.
  • Neurons and sperm exhibit functional similarities, including shared receptors and signaling pathways, with a key role for exocytosis.

Conclusions:

  • Human brain and testis share significant biochemical characteristics and functional attributes.
  • These similarities may contribute to the expression of common proteins and play a role in speciation.
  • Further investigation is needed to elucidate these connections for therapeutic advancements.