Final answer:
The skeletal and muscular systems collaborate to enable movement, with muscles contracting to pull on bones that act as levers around joints.
Step-by-step explanation:
When skeletal muscles contract, bones move. Muscles are attached to bones at joints, and when they contract, they pull on the bones, causing movement.
Bones act as levers and joints serve as fulcrums, allowing muscles to apply the force needed for movement. For example, in the leg, the femur acts as the attachment point for muscles, and as they contract, they cause the bone to move.
Movement in the human body is facilitated by the skeletal and muscular systems working in tandem. The muscles are attached to the bones via tendons and ligaments. When these muscles contract, they pull on the bones, which then act as levers to cause movement.
For example, in the leg, the femur provides the attachment points for the surrounding muscles. As these muscles contract, the femur moves, allowing joints such as the hip and knee to function effectively.
This interplay is essential for both locomotion and stability, with thicker and stronger bones in the lower limbs to support the body's weight and the dynamic forces involved in movement.
The leg's femur is a prime example, as it functions as an attachment point for muscles that facilitate movement in the hip and knee joints.