Here's why:
* Lever: A lever is a rigid object that pivots around a fixed point.
* Fulcrum: The fixed point around which the lever pivots.
* Living Lever: In your body, bones act as the levers, and muscles provide the force to move them. Joints, where bones meet, allow for movement and act as the fulcrum.
For example, in your arm:
* Lever: Your forearm bone (radius and ulna)
* Fulcrum: Your elbow joint
* Force: Contraction of your biceps muscle
* Load: The weight you're holding in your hand
Let me know if you'd like more examples or want to delve deeper into different types of levers in the human body!