Which bone is described as the longest and largest in the human body?

The femur is the longest and largest bone in the human body, playing a crucial role in supporting weight and facilitating movement. It is located in the thigh, extending from the hip to the knee, and is integral to activities such as walking, running, and jumping. The femur is designed to bear significant loads and withstand the stresses placed upon it during various activities.

Its unique structure includes features such as a strong shaft and a rounded head that fits securely into the hip joint, allowing for a wide range of motion. Additionally, the length of the femur allows for effective leverage during leg movements, contributing to locomotion efficiency. This makes it a central component of the skeletal system in terms of both function and biomechanics.