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.
15. Nervous System: Autonomic Nervous System I. Comparison of the Somatic and Autonomic Nervous Systems The somatic nervous system is fairly straightforward. It consists of somatic motor neurons with bodies located in the brain or spinal cord and axons that extend through cranial or spinalnerves.5. Nervous System: Autonomic Nervous System I. Comparison of the Somatic and Autonomic Nervous Systems The somatic nervous system is fairly straightforward. It consists of somatic motor neurons with bodies located in the brain or spinal cord and axons that extend through cranial or spinalnerves.