[Solved] About what did Justice Potter Stewart confess,"I know it when I see it"? A) state laws that make flag burning a crime are too lenient B) speech inciting violence C) pornography D) sedition E) slander Mesonephros: One of three excretory organs appearing during embryonic development; forms caudal to the pronephros as the pronephros disappears. It is well developed and is functional for a time before the establishment of the metanephros, which gives rise to the kidney. It undergoes regression as an excretory organ, but its duct system is retained in the male as the efferent ductule and epididymis. Mandibular Processes: Portions of the mandible or lower jawbone involved in the formation of the chin and sides of the lower jaw. Mesonephros: An embryonic kidney that serves as an interim kidney while the final kidney (metanephros) is forming in vertebrates. Neural Tube: Tube formed from the neuroectoderm by the closure of the neural groove; develops into the spinal cord and brain.