In the testicles sperm is produced in coiled structures known as seminiferous tubules The epididymis runs along the top of each testicle. This is a cord-like structure where sperm develop and are stored. When the penis fills with blood and gets erect the release process begins.
Sperm develop in the testicles within a system of tiny tubes called the seminiferous tubules. At birth, these tubules contain simple round cells. During puberty, testosterone and other hormones cause these cells to transform into sperm cells.
What it does is that it moves the solutes and water out of the filtrate and back into the bloodstream. This is where all of the nutrients is being moved out of the filtrate and into your body hence why you are healthy.
