nervous system diagrams

August 03, 2026

General

Define nervous. nervous synonyms, nervous pronunciation, nervous translation, English dictionary definition of nervous. adj. 1. a. Of or relating to the nerves or nervous system: nervous tissue. b. Stemming from or affecting the nerves or nervous system: a nervous disorder.... Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago. In vertebrates, it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. In a study published online today in Nature, researchers at Albert Einstein College of Medicine describe the first complete wiring diagram of the nervous system of an animal, the roundworm ... Try to act confidently, even if you feel nervous. I thought I would remain calm, but when I was confronted with/by the TV camera, I became very nervous. There were a few nervous giggles from people in the audience. The stock market's recent seesaw movements have made many investors nervous. The meaning of NERVOUS is timid, apprehensive. How to use nervous in a sentence. Synonym Discussion of Nervous. For related background details, please refer to our report on hot water boiler piping diagram. Synonyms for NERVOUS: worried, anxious, upset, uneasy, apprehensive, troubled, hesitant, concerned; Antonyms of NERVOUS: easy, calm, relaxed, collected, cool, confident, sure, nerveless If someone is nervous, they are frightened or worried about something that is happening or might happen, and show this in their behaviour. Find 101 different ways to say NERVOUS, along with antonyms, related words, and example sentences at Thesaurus.com. NERVOUS definition: highly excitable; unnaturally or acutely uneasy or apprehensive. See examples of nervous used in a sentence.