The muscular system is a network of muscles that enables movement in the body. It consists of three main types of muscles: skeletal muscles, which are attached to bones and help us move; smooth muscles, found in organs like the stomach; and cardiac muscle, which makes up the heart. These muscles work together to perform various functions, from walking to digesting food. Muscles contract and relax to create movement, and they require energy to function. The muscular system is essential for everyday activities, such as lifting objects, running, and even breathing. Keeping muscles strong and healthy through exercise is important for overall well-being.