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Testes and Epididymis - Anatomy & Physiology (view source)
Revision as of 08:59, 11 August 2008
, 08:59, 11 August 2008no edit summary
***Adluminal Compartment - Containing Spermatocytes, Spermatids and spermatozoa
***Adluminal Compartment - Containing Spermatocytes, Spermatids and spermatozoa
The Sertoli cells are much larger than the developing germ cells and span the basement membrane to the lumen of the seminipherous tubules. Their function is provide support to developing germ cells and form the Blood-testis barrier. The number of sertoli cells within a testis determine the sperm production capabilities of that individual.
The Sertoli cells are much larger than the developing germ cells and span the basement membrane to the lumen of the seminipherous tubules. Their function is provide support to developing germ cells and form the Blood-testis barrier. Each sertoli cells can only support a maximum number of developing germ cells. Therefore, the number of sertoli cells within a testis determine the sperm production capabilities of that individual.
**peritubular cells - contractile cells surrounding the seminipherous tubules
**peritubular cells - contractile cells surrounding the seminipherous tubules
==Comparative Testicular Architecture==
==Comparative Testicular Architecture==
There are species differences between Sertoli cell number and parenchyma composition. In the Boar the parenchyma is made up from many Leydig cells and little lymph space, humans and Rams contain slighly more lymph space and the rat parenchyma is mainly lymph space with few leydig cells.
==Function==
==Function==
*Production of spermatozoa by Sertoli cells
*Production of spermatozoa by Sertoli cells
*Production of hormones by intersticial Leydig cells
*Production of hormones by intersticial Leydig cells
*The Blood-Testes Barrier formed by tight junctions between neighbouring Sertoli cells. This barrier prevents White blood cells from entering the adluminal compartment of the seminipherous tubules and autoreacting to the haploid spermatids within it.
==Histology==
==Histology==
[[Image:Mature dog testis.jpg|thumb|right|150px|Mature Testis (Dog) - Copyright RVC 2008]]
==Vasculature==
==Vasculature==