5 Scrotum Functions Thermoregulation Sweat glands Thermosensetive nerves Protection and support of testis
6 The scrotum is a two lobed sack The scrotum is a two lobed sack. It protects and supports the testes and is required for proper temperature regulation.The scrotum consists of four major layer. They are:1) the skin.2) the tunica dartosSmooth muscleElevate testes for a sustained period of time in response to temperature or stress3) the scrotal fascia4) parietal tunica vaginalis- The scrotal skin is heavily populated with sweat glands. These sweat glands are required for maintenance of proper testicular temperature. Sweating allows the scrotum to be cooled by evaporative heat transfer.
7 Scrotum Descent of testes into scrotum Timing: Sheep / cattle = midgestationHumans / horses = just before or afterbirth
34 Spermatic Cordspermatic cord extends from the inguinal ring to it’s attachment on the dorsal pole of the testis. It suspends the testis in the scrotum.The function of the spermatic cord is provides the pathway to and from the body for testicular vasculature, Lymphatic and nerves.
35 Spermatic CordThe spermatic cord also houses the ductus deferent, cremaster muscle and specialized vascular network called the pampiniform plexus.The pampiniform plexus is a vascular structure consisting of an intimately intertwined artery and vein and this structure is important for proper temperature control of the testis
36 Spermatic Cord - Functions Suspends testis in scrotumPathway to blood vessels, lymphatics, & nervesThermoregulation mechanismPampiniform plexusCremaster musclePulse pressure eliminator
46 Prostate GlandLocated caudal to seminal vesicles and close proximity to pelvic urethraBilobed in bullDiffuse in ramSurrounds urethra in dogs & humansFunction = cleanse & lubricate and secretes just prior during ejaculationOnly accessory gland in dog
47 Prostate GlandThe prostate gland of the dog is spherical, smooth and divided into right and left lobes which completely surrounded the urethra.In the cat the prostate gland has an uneven surface and covers the urethra dorsally and laterally only.