the nervous system diagram

August 03, 2026

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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 ... 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. Your sympathetic nervous system is one of the branches of your autonomic nervous system. It controls functions under unconscious control related to “fight or flight.” Your nervous system plays a ... The central nervous system consists of the brain and spinal cord. The central nervous system controls thought, movement, and emotion, as well as breathing, heart rate, hormones, and body temperature. For related background details, please refer to our report on wiring a photocell to a light. 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. Synonyms for NERVOUS: worried, anxious, upset, uneasy, apprehensive, troubled, hesitant, concerned; Antonyms of NERVOUS: easy, calm, relaxed, collected, cool, confident, sure, nerveless