Anatomy and physiology. The male reproductive system.
نویسنده
چکیده
The male reproductive hormonal axis Maintenance of normal reproductive function is depend ent on the coordinated release of hormones in the hyp o thalamic−pituitary−testis cascade. Gonadotropinreleasing hormone (GnRH) is released in a pulsatile pattern into the pitu itary portal blood system from neuroendocrine cells in the basal hypothalamus and acts to stimulate gonadotropes in the anter ior pituitary to synthesize and release two peptide hormones, folliclestimulating hormone (FSH) and luteinizing hormone (LH) into the circulation. Once in the bloodstream these hor mones reach the testis, where LH stimulates testosterone production by the Leydig cells in the interstitium while FSH supports spermatogenesis in the seminiferous epithelium by stimulation of the Sertoli cells. A focused network of negative feedback relationships finesse testosterone secretion and sperm production. This cascade is maintained by steroid and peptide feedback within the testis as well as the hypothalamic and pitu itary gland (see Figure 1.1).
منابع مشابه
Altered Testicular Histomorphometric and Antioxidant Levels Following in vivo Bisphenol-A Administration
Background: Bisphenol-A (BPA) is a pervasive environmental toxin that is used in the production processes of many consumables and equipment that are in daily application. The aim of this study was to determine the effects of BPA on the structural and functional integrity of the reproductive system in male Wistar rats and its interaction with melatonin. Methods: Adult female rats in pro-estrus ...
متن کاملMale Reproductive System — Anatomy and Physiology 1
Basic understanding of the male reproductive system is fundamental in effective evaluation and treatment of male infertility. This chapter is a concise introduction to the male reproductive anatomy and the intricately designed process of spermatogenesis along with its hormonal control.
متن کاملEffect of Electromagnetic Fields on the Male Mice Reproductive System
Purpose: Previous studies have been shown that electromagnetic fields (EMF) can affect on functional activity of the female mice reproductive system. The aim of this study was to evaluated the effect of low frequency of EMF on histopathological changes of young male mice reproductive system. Materials and Methods: Eighteen male balb/c mice (6 week ages) were divided -at random into 3 groups of...
متن کاملProtective effect of crocin on electromagnetic field-induced testicular damage and heat shock protein A2 expression in male BALB/c mice
Objective(s): Exposure to electromagnetic fields (EMF) emitted from mobile phones may cause a deleterious effect on human health and may affect the male reproductive system. Crocin, a carotenoid isolated from Crocus Sativus L. (Saffron), is a pharmacologically active component of saffron. So, this study was conducted to investigate the protective effect of crocin on t...
متن کاملP-80: The Effects of Rosa Damascene Aqueous Extract on Reproductive System of Female Mice Following Formaldehyde Treatment
Background Formaldehyde is a chemical precursor, flammable and colorless which is widely used in different industries. Previous studies, have reported that Formaldehyde has destructive effects on reproductive system of female mice. In the present study we aimed at evaluating the protective effects of Rosa damascene on the toxic effects of Formaldehyde on sex hormones, ovary parameters and folli...
متن کاملMorphometrical and Histological Analyses of the Epithelial Lining of Male Reproductive System in Wistar Rats Following Administration of Neem Leaves Extract
Background: Neem leaves (Azadirachta indica L.) have been used for many therapeutic purposes and medicinal applications. The extract of this plant has been used in both male and female genders as a traditional agent to prevent early pregnancy. In this study, the effect of this extract was investigated histologically and morphometrically on the germinal epithelia of the seminiferous tubules, epi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Nursing mirror
دوره 148 12 شماره
صفحات -
تاریخ انتشار 1979