â¢ In grade 4 mathematics, seven of the 50 states included in the analysis set standards for proficiency (as measured on the NAEP scale) that were lower than the Basic performance on NAEP, 42 were in the NAEP Basic range, and one in the Proficient range. In grade 8 mathematics, 12 of 49 states included in the analysis
noun, plural: skeletal muscles. A voluntary, striated (vertebrate) muscle that is associated with the skeleton, and thus move parts of the skeletal system. Supplement. The muscular system of the vertebrates is comprised of various muscles.
Most skeletal muscles are attached to bones by bundles of collagen fibers known as tendons. A skeletal muscle refers to multiple bundles of cells called muscle fibers (fascicles). The fibres and muscles are surrounded by connective tissue layers called fasciae. Muscle fibres, or muscle cells, are formed from the fusion of developmental myoblasts in a process known as myogenesis.