Browse the corpus

Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

1 passage

introductionstatpearls· Introduction· item NBK537195

There are three varieties of human of muscles: skeletal, smooth, and cardiac. Skeletal striated muscle is the most abundant type (over 400 distinct muscles), is the only muscle under voluntary control, and in individuals with normal body mass index, represents approximately 40% of their body weight.[1] Smooth muscle manages contraction of non-voluntary muscles. The role of smooth muscle in human physiology is more expansive than skeletal muscle having a role in nearly every organ system ranging from creating vascular resistance to uterine contractions.[2] Cardiac muscle, like smooth muscle, is not-voluntarily controlled. The feature of this muscle type that is unique is its automaticity.[3] While these muscles differ on cellular levels, they all work to convert chemical energy into mechanical work and movement.[1]