Published: August 15, 2020 Revised: June 23, 2022 The dictionary defines an organ as "a differentiated structure (such as a heart, kidney, leaf, or stem) consisting of cells and tissues and performing some specific function. An alternate definition is "bodily parts performing a function or cooperating in an activity." Merriam-Webster gives "the eyes and related structures that make up the visual organs" as an example. [1] The penis is the most visible organ in the reproductiv