English-Ireland (top end) Renown is listed as a verb in Chambers Dictionary. I looked for etymology - the similarity with known is tantalising.... The M.E. verb renown has been assimilated to the noun via renowned famous, celebrated (c.1375). Source.
In Depth: Nervous. The nervous system has two major parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The central system is the primary command center for the body, and is comprised of the brain and spinal cord. The peripheral nervous system consists of a network of nerves that connects the rest of the body to the CNS.
The size of the nervous system ranges from a few hundred cells in the simplest worms, to around 300 billion cells in African elephants. The central nervous system functions to send signals from one cell to others, or from one part of the body to others and to receive feedback. Malfunction of the nervous system can occur as a result of genetic defects, physical damage due to trauma or toxicity, infection or simply of ageing.