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Viscosity01:17

Viscosity

When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
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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.
The maturation phase occurs in the epididymis, where sperm...
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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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媒介粘度影响解后雄羊精子的动性行为

A Martín-Maestro1, L Abril-Parreño2,3, A J Soler1

  • 1SaBio IREC (UCLM-CSIC-JCCM), ETSIAMB, Albacete, Spain.

Reproduction in domestic animals = Zuchthygiene
|October 13, 2024
PubMed
概括

介质粘度增加会对雄羊精子的运动性和向流动方向的运动 (转生) 产生负面影响. 较高的甲基纤维素度显著减少了精子的数量.

关键词:
甲基纤维素酸是甲基纤维素的雄羊 雄羊 精子 精子类风湿性病 (rheotaxis) 是一种疾病.粘度 粘度 粘度 粘度 粘度

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科学领域:

  • 生殖生物学 生殖生物学
  • 精子生理学 精子生理学
  • 生物物理学的生物物理.

背景情况:

  • 精子的运动性和转化作用对于自然受精至关重要.
  • 了解影响精子功能的因素对于人工授精和生殖技术至关重要.
  • 介质粘度是影响精子行为的一个潜在环境因素.

研究的目的:

  • 为了研究不同介质粘度对雄羊精子运动性,动力学和质学的影响.
  • 为了在体外确定最佳的甲基纤维素度,以保持雄羊精子的功能.
  • 为了阐明流体动力学和精子行为在受控环境中的关系.

主要方法:

  • 雄羊精液被冷保存并解.
  • 精子被稀释在Tyrode的白酸乳酸硫酸盐 (TALP) 介质中,用甲基纤维素 (0-0.7%).
  • 使用计算机辅助精子分析 (CASA) 分析了精子运动和动力学.
  • 在微流体通道中对受控流速进行了风湿性评估.

主要成果:

  • 更高的甲基纤维素度显著降低了精子运动性和动力学参数 (p < .05).
  • 增加的粘度导致了积极的转化毒的显著减少 (p < .05).
  • 甲基纤维素度与精子性能降低直接相关.

结论:

  • 媒介粘度显著影响雄羊精子的运动性,动力学和动性行为.
  • 较高的粘度会对雄羊精子在抗流体流动时的导航能力产生负面影响.
  • 这些发现对优化精液处理和公羊人工生殖技术有意义.