45+ First Class Lever Anatomy. Learn about 1st class levers,2nd class levers, and 3rd class levers. Fulcrum in the middle between effort and resistance.
Have the fulcrum in the middle, between the load and resistance.
Image adapted from openstax anatomy and physiology. Levers are simple machines — apparatuses composed of few or no moving parts that make performing a. Force is applied on the muscles by the weight of our body at. An example of a first class lever in the human body is the head and neck during neck extension.