type of muscle that forms the walls of the heart and controls your heartbeat

__________________ anchors the the muscle to bone

Each unit in a muscle fiber is called a __________.

A person has torn the muscle inside of his stomach. What type of muscle tissue is torn?

sheet of tissue that covers or connects parts inside the body

1.  painful, involuntary muscle contraction, usually caused by fatigue or strain

1. area where actin and myosin overlap

1. small gap between the myosin and the Z-band at the end of the sarcomere

1. muscle cell

1. composed of thick (myosin) and thin (actin) filaments

tissue that has the ability to contract to help with movement

1. when the sarcomere shortens and the Z-lines move closer together

1. injury to the joints caused by overstretching

injury to the muscle caused by overstretching

1. muscles that are located in the layer closest to the skin

 smooth muscle found in the digestive, respiratory and circulatory systems