Hi,dear valued visitor. Thanks for coming and here's an assurance,you are in the right place .Please before you continue scrolling down ,visit the sidebar up there to subscribe to this blog to enable us help you get premium enjoyment from us. Otherwise,tap here. Reproduction (man): Reproduction is the union of male and female gametes to form a zygote.As it is common with other terrestrials, man has developed a more certain means of bringing the gametes together.. The sperm is produced in the numerous seminiferous tubules in the testes . From there it passes through the vasa efferentia and epididymis into the VAS deferens. For the sperm to be introduced into the female, it is necessary for the penis to be inserted into the vagina in an act of coitus or corpulation. Under conditions of erotic excitement the arteries in the penis dilates and the veins then constrict. The resultant high blood pressure in the penis causes the penis to become erect . As t...