The epididymis has the following main physiological functions.
1. Storage sperm
After the sperm enters the epididymis, it usually stays for 19-25 days. The sperm reaches the epididymis tail. If it fails to discharge in time, it will be stored at the tail first.Due to the special environment in the epididymium, its liquid is acidic, the osmotic pressure is very high, the oxygen content is low, and the carbon dioxide content is high, so that the sperm is in a static state, so as to store energy.Sperm can survive at the end of the epididymis for 28 days or more.
2. Secret nutrients and promote the maturity of sperm
Etate -test secretion function is very strong, which can secrete glycerin choline, botox, glycoprotein and multiple enzymes. These substances are related to metabolism, maturity and normal physiological function of sperm.Sperm is by no means staying and passing by in the epididymis. Instead, in a long journey, it continues to absorb nutrients secreted by the epididymis wall, such as botoxine, and continue to develop until the mature state.The concentration of alkaline in epididymis can be 500 times in the blood.Animal experiments have shown that if the epididymis is removed, the vascus tube is directly consistent with the testicular output tube, and the sperm discharged by the vasters does not have the essence.If the vascus tube is close to 1 cm at the end of the epididymis, the sperm discharged is dynamic and fertilized.This shows that the epididymal head is absolutely necessary for sperm maturity.The glycerin choline secreted by epididymia is related to the high -seepage micro -environment at the end of the epididymal tail. It can also be used as the energy of sperm in the female reproductive tract. Because there is an enzyme in the female reproductive tract, the glycerin phosphate choline can be decomposed into lactic acid and fructose sugarEssence
3. Immune barrier effect
The epididymis itself has a barrier, which can prevent sperm from entering the epididymia epithelium to avoid autoimmune reactions.After the vastonal ligation, this barrier may be destroyed, so the special macromolecular substance (antigen) on the sperm surface is in contact with the immune system in the body, and the side reaction after the transparent tubular ligation will occur -the autoimmune of the sperm antigen willreaction.To put it simply, it is a substance (immunoglobulin or antibody) in the body, which can inhibit sperm activity or kill sperm.
