07 - Male Reproductive System Spermatogenesis Rat A...

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Male Reproductive System
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Spermatogenesis
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Testis Rat Seminiferous tubule A cross-section of a seminiferous tubule Epididymis
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Cells involved in spermatogenesis 1. Sertoli cells 2. Leydig cells 3. Germ cells
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Sertoli cells -Function as nurse cells -Extend from the basement membrane to the lumen -Form the “Blood-testis barrier” -Provide a microenvironment for germ cells to develop -Provide physical support for germ cells -Secrete substance to initiate meiosis Leydig cells -Produce testosterone Tight junction formed between Sertoli cells
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Germ cells - Spermatogonia - Primary spermatocytes - Secondary spermatocytes -Spermat ids In mammal, different types of germ cells within the seminiferous
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Spermatogenesis -Takes place in seminiferous tubule - Consists of three distinct phases 1. Spermatocytogenesis 2. Meiosis 3. Spermiogenesis 1.Spermatocytogenesis - Takes place in the basal compartment of the seminiferous epithelium - Increased cell number by mitotic proliferation - Spermatogonial stem cells are reactivated at puberty and
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This note was uploaded on 03/12/2012 for the course BIOL 0126 taught by Professor Wux. during the Winter '11 term at HKU.

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07 - Male Reproductive System Spermatogenesis Rat A...

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