<P> In vertebrate animals , there are three types of muscle tissues : skeletal , smooth , and cardiac . Skeletal muscle constitutes the majority of muscle mass in the body and is responsible for locomotor activity . Smooth muscle forms blood vessels , gastrointestinal tract , and other areas in the body that produce sustained contractions . Cardiac muscle make up the heart , which pumps blood . Skeletal and cardiac muscles are called striated muscle because of their striped appearance under a microscope , which is due to the highly organized alternating pattern of A bands and I bands . </P>
<P> In vertebrate animals , there are three types of muscle tissues : skeletal , smooth , and cardiac . Skeletal muscle constitutes the majority of muscle mass in the body and is responsible for locomotor activity . Smooth muscle forms blood vessels , gastrointestinal tract , and other areas in the body that produce sustained contractions . Cardiac muscle make up the heart , which pumps blood . Skeletal and cardiac muscles are called striated muscle because of their striped appearance under a microscope , which is due to the highly organized alternating pattern of A bands and I bands . </P>
muscles that assist in a movement are called
muscles that assist in a movement are called
Skeletal muscle
Skeletal muscle