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Related Concept Videos

Testes: Histology01:27

Testes: Histology

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.
The spermatogenic cells, responsible for producing sperm, are...
Testes: Gross Anatomy01:19

Testes: Gross Anatomy

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.
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
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...
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...
Testosterone: Functions and Regulation01:26

Testosterone: Functions and Regulation

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...
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...

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Related Experiment Video

Updated: Jul 3, 2026

Clinical Application of 24 G Cannula Needle and 3-0 Polypropylene Suture in Vas Deferens Exploration
07:21

Clinical Application of 24 G Cannula Needle and 3-0 Polypropylene Suture in Vas Deferens Exploration

Published on: February 10, 2023

Factors controlling testis descent.

Ieuan A Hughes1, Carlo L Acerini

  • 1Department of Paediatrics, Addenbrooke's Hospital, University of Cambridge, Box 116, Hills Road, Cambridge CB20QQ, UK. iah1000@cam.ac.uk

European Journal of Endocrinology
|July 24, 2008
PubMed
Summary
This summary is machine-generated.

Testis descent is crucial for male fertility and involves hormonal and anatomical factors. Environmental chemicals may disrupt this process, highlighting the need for screening and early intervention to prevent infertility and reduce cancer risk.

More Related Videos

Analysis of Epididymal Protein Synthesis and Secretion
10:23

Analysis of Epididymal Protein Synthesis and Secretion

Published on: August 25, 2018

Related Experiment Videos

Last Updated: Jul 3, 2026

Clinical Application of 24 G Cannula Needle and 3-0 Polypropylene Suture in Vas Deferens Exploration
07:21

Clinical Application of 24 G Cannula Needle and 3-0 Polypropylene Suture in Vas Deferens Exploration

Published on: February 10, 2023

Analysis of Epididymal Protein Synthesis and Secretion
10:23

Analysis of Epididymal Protein Synthesis and Secretion

Published on: August 25, 2018

Area of Science:

  • Developmental biology
  • Endocrinology
  • Reproductive medicine

Background:

  • Testis descent from intra-abdominal to scrotal location is essential for spermatogenesis.
  • This process involves transabdominal and inguinoscrotal phases, regulated by androgens and insulin-like 3 (INSL3).
  • Undescended testes (cryptorchidism) can lead to infertility and increased cancer risk.

Purpose of the Study:

  • To review the hormonal and anatomical factors controlling fetal testis descent.
  • To explore the role of environmental chemicals, particularly endocrine disruptors, in cryptorchidism.
  • To discuss the implications for fertility and cancer risk, and the need for early intervention.

Main Methods:

  • Review of existing literature on testis descent mechanisms.
  • Analysis of hormonal regulation, including androgens and INSL3.
  • Examination of epidemiological data on cryptorchidism prevalence and environmental factors.

Main Results:

  • Androgens and INSL3 are key regulators of testis descent; mutations in INSL3 or its receptor are linked to cryptorchidism.
  • Environmental endocrine disruptors, like bisphenol A, may interfere with testis descent, as suggested by studies on anogenital distance.
  • Geographical variations in cryptorchidism prevalence suggest environmental influences.

Conclusions:

  • Proper testis descent is vital for male reproductive health.
  • Environmental factors may contribute to the increasing prevalence of undescended testes.
  • Early screening and surgical correction are crucial for optimal outcomes.