Involuntary cardiac and smooth muscles are responsible for contraction of the heart and movement of substances through hollow organ systems, respectively, and voluntary skeletal muscles are ...

Cardiac muscle cells contract and relax to pump blood around our bodies. Smooth muscle cells make up thin sheets of muscle, such as the stomach lining. Skeletal muscle is joined to bones.

Our body has over 600 muscles, and together they account for approximately 40 percent of our weight, according to the US National Cancer Institute. "Smooth, cardiac, and skeletal muscles are the ...

A muscle strain, or a pulled muscle, is among the most common injuries affecting people of all ages, particularly those engaging in physical activity or sports.

Smooth muscle lacks the striated structure ... called cardiac muscle that is only found in the heart. Cardiac muscle is striated like skeletal muscle, but is controlled by both the autonomic ...