2
          
          
            ZnSO
            
              4
            
            
              
            
          
          +
          2
          
          
            H
            
              2
            
            
              
            
          
          O
          ⟶
          2
          
          Zn
          +
          
            O
            
              2
            
            
              
            
          
          +
          2
          
          
            H
            
              2
            
            
              
            
          
          
            SO
            
              4
            
            
              
            
          
        
      
    
    {\displaystyle {\ce {2ZnSO4 + 2H2O -> 2Zn + O2 + 2H2SO4}}}
  The sulfuric acid is regenerated and recycled to the leaching step.
As well as glands, the seminal vesicles contain smooth muscle and connective tissue. This fibrous and muscular tissue surrounds the glands, helping to expel their contents. The outer surface of the glands is covered in peritoneum. Function
The seminal vesicles secrete a significant proportion of the fluid that ultimately becomes semen. Fluid is secreted from the ejaculatory ducts of the vesicles into the vas deferens, where it becomes part of semen. This then passes through the urethra, where it is ejaculated during a male sexual response.About 70-85% of the seminal fluid in humans originates from the seminal vesicles. The fluid consists of nutrients including fructose and citric acid, prostaglandins, and fibrinogen. Nutrients help support sperm until fertilisation occurs; prostaglandins may also assist by softening mucous of the cervix, and by causing reverse contractions of parts of the female reproductive tract such as the fallopian tubes, to ensure that sperm are less likely to be expelled. Clinical significance
Disease
Diseases of the Seminal vesicles as opposed to that of prostate gland are extremely rare and are infrequently reported in the medical literature.Congenital anomalies associated with the seminal vesicles include failure to develop, either completely (agenesis) or partially (hypoplasia), and cysts. Failure of the vesicles to form is often associated with absent vas deferens, or an abnormal connection between the vas deferens and the ureter. The seminal vesicles may also be affected by cysts, amyloidosis, and stones.