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Copulatory Behaviour - Anatomy & Physiology (view source)
Revision as of 12:02, 10 July 2008
, 12:02, 10 July 2008→Ejaculation
== Ejaculation ==
== Ejaculation ==
* The reflex expulsion of spermatozoa and seminal plasma from the male reproductive tract.
* Sensory stimulation, primarily to the glans penis causes a series of coordinated muscular contractions.
* Once intromission has been achieved, reflex impulses are initiated.
** Neural impulses derived mainly from sensory nerves in the '''glans penis'''.
* Upon threshold stimulation, impulses are transmitted from the glans peinis by the '''internal pudendal nerve''' to the lumbosacral region of the spinal cord.
* Sensory impulses result in firing of nerves in the '''spinal cord'''.
* Forcing of semen into the '''urethra''' by nerves in the '''hypogastric plexus''' innervating target muscles.
** '''Urethralis''' muscle
** '''Ischiocavernosus''' muscle
** '''Bulbospongiosus''' muscle
* '''Emission''' and ejaculation
** Emission is the movement of seminal fluids from the accessory sex glands into the pelvic urethra so that they can mix with spermatozoa.
** Emission occurs before and during ejaculation.
== Dog ==
== Dog ==