Which components make up the muscular system?

The muscular system is composed of three main types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscle. Skeletal muscles are attached to bones and facilitate voluntary movement, allowing for actions such as walking and lifting. Cardiac muscle, found only in the heart, is responsible for pumping blood throughout the body involuntarily. Smooth muscle is located in the walls of hollow organs, such as the intestines and blood vessels, and helps in involuntary movements such as digestion and circulation.

The other options refer to different systems or components that do not directly define the muscular system. The skeletal component refers to bones, tendons, and ligaments that support and stabilize the body but are part of the skeletal system, not the muscular system itself. The third option relates to the circulatory system, focusing on blood vessels, which is separate from the muscular system. Lastly, the fourth option pertains to the nervous system, which consists of the brain, spinal cord, and nerves, responsible for transmitting signals and not directly related to muscle tissue. Understanding these distinctions helps clarify the specific components of the muscular system.