Matching Pairs how the male reproductive systems worksOnline version pasos relacionados con el proceso de las partes del aparato reproductor masculino by Gonzalo Panadero Carramolino 1 Third step 2 Fourth step 3 Fifth step 4 Second step 5 First step Mature sperm pass into the vas deferens Semen enters the urethra inside the penis to be ejaculated The testicles produce testosterone and sperm The prostate gland protects and give nutrients to the sperm In the seminal vesicle sperm are mixed with a liquid to form semen