What is the parasympathetic nervous system

   One of the peripheral, autonomic nervous systems

Explanation:  The parasympathetic nervous system is part of the overall nervous system of the organism and has the function of controlling those actions in the body that take place unconsciously, i.e. when we are not aware of them. This means, for example, regulating the metabolism, expansion and contraction of the pupil of the eye when changing light flux, activating certain reactions to stimuli that we did not consciously do, etc. This parasympathetic nervous system is important for body rest and energy balance.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.

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