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.
an option in the bottom right to save your answers and come back later, but once you submit this assignment, it will be graded. Autonomic Nervous System Case Study The autonomic nervous system (ANS or visceral nervous system) is a part of the peripheral nervous system. The two major divisions are the sympathetic (fight and flight) and the parasympathetic (rest and digest) systems. Afferent neurons carry impulses from all the organs of the body to controlling centers in the central nervous system.