Aluminium versus aluminum. Following up a Topical Words piece on the international spelling of what British English writes as sulphur, many American subscribers wrote in to ask about another element with two spellings: aluminium.
The simplest and presumably most primitive form of nervous system is termed a nerve net. In a nerve net, neurons are dispersed in a thin layer, not clustered into nerves or a central nervous system (CNS), and they are positioned seemingly at random relative to each other.he simplest and presumably most primitive form of nervous system is termed a nerve net. In a nerve net, neurons are dispersed in a thin layer, not clustered into nerves or a central nervous system (CNS), and they are positioned seemingly at random relative to each other.
What is the basic unit of structure and function in the nervous system? A: The neuron is the basic unit in the nervous system, acting as a specialized conductor cell that receives and transmits electrochemical nerve impulses, explains Dr. Ananya Mandal. A typical neuron has a cell body and long processes that transmit impulses from one part of the body to another part. Continue Reading.