Z discs - a dark line separating adjacent I-bands in muscle cells., Sarcomeres - the basic contractile unit of muscle fiber., Myosin - a protein of muscle that with actin is active in muscular contraction., Actin - a protein that forms the contractile filaments of muscle cells, and is also involved in motion in other types of cells., Calcium - A mineral needed for healthy teeth, bones, and other body tissues., Dark Band - contains the whole thick filament (myosin) as well as the end of actin filaments., Light Band - contains only the thin filament (actin)., Cross bridges - the attachment of myosin with actin within the muscle cell., Myosin heads - the part of the thick myofilament made up of myosin that acts in muscle contraction, by sliding over thin myofilaments of actin.,

Muscular System Definitions

Leaderboard

Visual style

Options

Switch template

Continue editing: ?