What organs comprise the muscular system?

The muscular system is primarily made up of muscles and tendons. Muscles are responsible for movement, allowing the body to perform various activities such as walking, running, and lifting. Tendons are connective tissues that attach muscles to bones, enabling the transfer of force from the muscle to the skeleton, which is essential for movement.

Understanding the role of muscles and tendons in the muscular system is crucial because they work together to facilitate voluntary and involuntary movements. For example, skeletal muscles are involved in voluntary movements, while smooth muscles control involuntary functions such as digestion. Tendons provide stability and support, ensuring that movements are executed effectively and efficiently.

In contrast, the other options involve organs from different systems. Lungs and heart are components of the respiratory and circulatory systems, respectively. The stomach and intestines are involved in the digestive system, while blood vessels and the heart are also part of the circulatory system. These organs serve different purposes and do not contribute directly to the muscular system.