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环境中的许多有害因素都能作用于动物的生殖系统,影响其正常的生理功能,有些因素能造成动物不育、流产和死亡,甚至给下一代动物带来不良影响。研究有害因素对动物生殖系统的影响,不仅关系到动物的遗传、育种、饲养与繁殖,而且对人类优生、计划生育、生殖毒理等方面的研究也有着重要意义。一、有害因素对雄性动物生殖系统的影响 1.对精子发生的影响精子发生是在睾丸的曲细精管进行的。性成熟后,精原细胞不断进行分裂,能周期性地形成大量精子。有害因素对精子发生的影响主要表现在质和量两个方
Many harmful factors in the environment can act on the reproductive system of animals, affecting their normal physiological functions. Some factors can cause infertility, miscarriage and death in animals, and even adversely affect the next generation of animals. Studying the impact of harmful factors on animal reproductive system is not only related to the inheritance, breeding, breeding and reproduction of animals, but also to the research of human eugenics, family planning and reproductive toxicology. First, the harmful factors on the reproductive system of male animals 1. The impact on sperm spermatogenesis is in testicular seminiferous tubules. After sexual maturity, spermatogonial cells continue to divide, can form a large number of sperm periodically. The impact of harmful factors on spermatogenesis is mainly manifested in two aspects of quality and quantity