[Solved] Which type of pain occurs as a result of abnormal processing of the pain impulse through the peripheral or central nervous system? A)Visceral pain B)Referred pain C)Cutaneous pain D)Neuropathic pain Digestive Tube: A continuous hollow tube extending from the mouth to the anus, through which food is processed and nutrients absorbed. Plankton: Free-floating, mainly microscopic aquatic organisms found in the upper layers of the water; consisting of phytoplankton and zooplankton. Compare with nekton. Microscopic Organisms: Organisms too small to be seen with the naked eye, often including bacteria, archaea, some fungi, and protists. Anus: The distal end and outlet of the digestive tract.