The muscles in the human body that are connected to bones and aid in movement of the (a)   are called skeletal muscles.

The muscles are connected to bones by (a)   .

Within each of the skeletal muscles are bundles of muscle fibers. These bundles are called (a)   .

Each skeletal muscle fiber contains many (a)   , which are rod shaped and contains many sarcomeres (the functioning unit of muscle tissue.)

The actin of the outermost myofibril is connected to the cell membrane by a protein called (a)   .