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Male Reproductive Tract - Horse Anatomy (view source)
Revision as of 11:03, 26 November 2012
, 11:03, 26 November 2012→Testes
===Testes===
===Testes===
The parenchyma of the testes is composed of the semniferous tubules, rete testis and efferent ducts. The '''semniferous tubules''' are the site of [[Spermatogenesis and Spermiation - Anatomy & Physiology|spermatogenesis]]. The walls of the semniferous tubules contain '''spermatogenic cells''' and their sustentacular cells, which are known as '''sertoli cells'''. The sertoli cells give support and also produce hormones. They regulate [[Spermatogenesis and Spermiation - Anatomy & Physiology|spermatogenesis]] and the release of spermatozoa into the lumen of the semniferous tubules.
In the horse, the left testicle is usually larger and more caudal than the right testicle. It is also usually suspended more ventrally.
The parenchyma of the testes is composed of the '''semniferous tubules''', '''rete testis''' and '''efferent ducts'''. The '''semniferous tubules''' are the site of [[Spermatogenesis and Spermiation - Anatomy & Physiology|spermatogenesis]]. The walls of the semniferous tubules contain '''spermatogenic cells''' and their sustentacular cells, which are known as '''sertoli cells'''. The sertoli cells give support and also produce hormones. They regulate [[Spermatogenesis and Spermiation - Anatomy & Physiology|spermatogenesis]] and the release of spermatozoa into the lumen of the semniferous tubules. Each semniferous tubule opens into a network of tubules called the '''rete testis'''. Each rete testis is drained by multiple '''efferent ducts''' which perforate the capsule of the testes to enter the '''head of the epididymis'''. The interstitial tissue between semniferous tubules contains '''Leydig cells'''. These cells produce androgens, such as '''testosterone'''.
The Blood-Testes Barrier is formed by tight junctions between neighbouring Sertoli cells. This barrier prevents leukocytes from entering the adluminal compartment of the seminipherous tubules and autoreacting to the haploid spermatids within it.
The '''spermatic cord''' runs from the abdomen caudally, through the '''inguinal canal'''. The inguinal canal is formed by the '''deep and superficial inguinal rings'''.
The '''spermatic cord''' runs from the abdomen caudally, through the '''inguinal canal'''. The inguinal canal is formed by the '''deep and superficial inguinal rings'''.
*Deep inguinal ring: Opening between the ''internal abdominal oblique'', ''rectus abdominis'', prepubic tendon and inguinal ligament.
*Deep inguinal ring: Opening between the ''internal abdominal oblique'', ''rectus abdominis'', prepubic tendon and inguinal ligament.
*Superficial inguinal ring: Opening in the ''external abdominal oblique''.
*Superficial inguinal ring: Opening in the ''external abdominal oblique''.
===Epididymis===
===Epididymis===