The "Systema Nervosum", commonly referred to as the nervous system, is a complex network of specialized cells called neurons that transmit signals between different parts of the body. There are several synonyms that can be used to describe this intricate system. The "neural network" refers to the web of interconnected neurons that work together to relay messages. "Nervous tissue" describes the tissue that makes up the nervous system, which consists of neurons and supporting cells called glial cells. Another synonym is the "neurological system", which emphasizes the role of the nervous system in regulating and controlling bodily functions. Ultimately, all of these synonyms refer to the same critical system that allows us to perceive, react, and interact with the world around us.