what primary function do the male’s vas deferens serve
Vas deferens The vas deferens (Latin: "carrying-away vessel"; plural: vasa deferentia), also called ductus deferens (Latin: "carrying-away duct"; plural: ductus deferentes), is part of the male reproductive system of many vertebrates; these vasa transport sperm from the epididymis to the ejaculatory ducts in anticipation of ejaculation. It is a partially coiled tube which ascends into the abdomen through the inguinal canal.
Sperm motility Sperm movement is activated by changes in intracellular ion concentration.[2] The changes in ion concentration that provoke motility are different among species. In marine invertebrates and sea urchins, the rise in pH to about 7.2â€“7.6 activates ATPase which leads to a decrease in intracellular potassium, and thus induces membrane hyperpolarization. As a result, sperm movement is activated.[3] The change in cell volume which alters intracellular ion concentration can also contribute to the activation of sperm motility. In some mammals, sperm motility is activated by increase in pH, calcium ion and cAMP, yet it is suppressed by low pH in the epididymis.