Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. For cell transport, diffusion is the movement of small molecules across the cell membrane. ... The kinetic energy of the molecules results in random motion, causing diffusion.
The structures that are responsible for producing semen are within the make reproductive system. these include the testes, epidymus, prostate, seminal vesicles, and the bulbourethral gland.
