In the following paper , I encountered one term "peripheral organs". Literally, based on my understanding, it should be related to the organs/tissues, such as skin, hair and ear in the human, and wing, antenna and leg in the insect. However, in reference , fat body, oviduct and hemocytes are listed as peripheral organs. Is there specific definition of "peripheral organ/tissue"?
 Verlinden, H., et al. (2010). "The role of octopamine in locusts and other arthropods." J Insect Physiol 56(8): 854-867.