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Related Concept Videos

Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
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...
Infertility in Males01:23

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
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...
Accessory Ducts of the Male Reproductive System01:25

Accessory Ducts of the Male Reproductive System

The male reproductive system is a complex network of organs and tissues that work together to produce and transport sperm. The epididymis, vasa deferens, ejaculatory ducts, and urethra are the accessory ducts involved in sperm maturation and transportation. These ducts play a critical role in the production 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.
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...

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Updated: Jun 21, 2026

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi
06:44

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

Forensic acarology: an introduction.

M Alejandra Perotti1, M Lee Goff, Anne S Baker

  • 1School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire, RG6 6AS, UK. m.a.perotti@reading.ac.uk

Experimental & Applied Acarology
|July 18, 2009
PubMed
Summary
This summary is machine-generated.

Mites, often unnoticed, are valuable in forensic science. Their presence and development stages on carcasses provide crucial timeline markers and evidence for crime scene investigations.

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Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence
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Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence

Published on: March 9, 2015

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Last Updated: Jun 21, 2026

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi
06:44

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence
11:49

Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence

Published on: March 9, 2015

Area of Science:

  • Forensic Science
  • Acarology
  • Ecology

Background:

  • Mites are ubiquitous arthropods found in diverse terrestrial and aquatic habitats, including human environments.
  • While often overlooked and generally harmless, mites play a significant role in decomposition processes.
  • The field of forensic acarology, pioneered by Jean Pierre Mégnin, utilizes mite evidence in legal investigations.

Purpose of the Study:

  • To highlight the utility of mites in forensic science beyond simple time-of-death estimation.
  • To explore the application of mite presence and life cycle data in criminal investigations.
  • To underscore the value of mites as indicators of body relocation and scene analysis.

Main Methods:

  • Observation of arthropod succession on carcasses, noting the presence and types of mites.
  • Analysis of mite life cycle stages in relation to fly development for timeline determination.
  • Micro-habitat specificity of mites to infer body movement or suspect location.

Main Results:

  • Mites are among the first arthropod scavengers on carcasses, appearing in early colonization waves alongside flies.
  • Mites reproduce rapidly, serving as precise timeline markers, especially in environments with limited insect access.
  • Mite distribution and species can indicate body relocation, presence at a crime scene, or trace evidence.

Conclusions:

  • Mites are indispensable tools in forensic acarology, offering critical data for investigations.
  • Their diversity, widespread occurrence, and abundance make them valuable for analyzing trace evidence and reconstructing events.
  • Forensic acarology extends the application of mite studies to determine time of death, body movement, and scene analysis.