The human body is made up of interconnected systems, such as the skeletal, muscular, cardiovascular, respiratory, digestive, and nervous systems, which perform specific functions. Organs are ...

The human skeletal system consists of all of the bones, cartilage, tendons, and ligaments in the body. Altogether, the skeleton makes up about 20 percent of a person’s body weight. An adult’s skeleton ...

Medically reviewed by Jennifer Steinhoff, MD Key Takeaways The lumbar spine includes five vertebrae that help with mobility ...

The humerus is your upper arm bone. It is the longest bone in the upper part of your body and is connected to many important tendons and ligaments. The top of the humerus is part of the shoulder joint ...