Levers can be classified into three different sections.
First Class Lever
For this type of lever the fulcrum is between the force and the load. An example of this would be a see saw.
Second Class Lever
For the second class lever the weight is between the fulcrum and the force.
Ex. Wheelbarrow, Ankle joint.
Third Class lever
The force is located between the fulcrum and weight. An example of this would be a fishing pole or shovelling snow, and a bicep curl.
The body is made up mostly of third class levers. Our movements are more adapted for speed and range rather than strength.