mathematics, of the 34 cases where states reported changes in their assessments (9 states in reading and 8 states in mathematics), the rigor of the standards increased in 21 cases, 8 showed no change in their standards, and in 5 cases the rigor of their standards (as measured by NAEP scale equivalents) decreased.
Skeletal muscles cover your skeleton, giving your body its shape. They are attached to your skeleton by strong, springy tendons or are directly connected to rough patches of bone. Skeletal muscles are under voluntary control, which means you consciously control what they do.
KidsHealth explains that skeletal muscles are voluntary muscles and they are part of the musculoskeletal system, which is comprised of the muscles and the skeleton. The skeletal muscles work together with the bones to provide power and strength to the body.