The function of the muscular layer of the ductus deferens is to assist in ejaculation. During ejaculation, the smooth muscle would contract, which would create pulsating contraction waves. The contractions would propel the sperms from the ductus (vas) deferens to the urethra. The innervation of the testicular vessels extends from L2. There are postganglionic axons that are in the lumbar and sacral regions. Splanchnic nerves carry the signal through the inferior mesenteric plexus, aortic plexus and hypogastric plexus to the pelvic organs. The pelvic organs would include the muscular layer of the spermatic cord. The arterial blood that supplies the spermatic cord is received from the long testicular arteries. The long testicular arteries branch from the aorta in the superior abdomen.
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