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en.wikipedia.org/wiki/Lever

A lever is a machine consisting of a beam or rigid rod pivoted at a .... for the 1st class lever, the r esistance is in the middle for the 2nd class lever, and the e ffort is in the middle for the 3rd class lever.

www.humankinetics.com/excerpts/excerpts/levers-work-to-create-movement-in-the-human-body

Levers are typically labeled as first class, second class, or third class. All three types are found in the body, but most levers in the human body are third class.

alexeinstein.wordpress.com/2014/09/03/lever-of-human-body

Sep 3, 2014 ... Lever second class , the load is between the pivot and the effort (force) and ... The fingers and hand are a class one, two or three lever system ...

anatomyandphysiologyi.com/lever-systems-bone-muscle-relationships

Jul 11, 2014 ... A wheelbarrow demonstrates this type of lever system. Second-class levers are uncommon in the body, but the best example is the act of ...

www.innerbody.com/image_musc04/musc73.html

While less common in the body than second and third class levers, the first class lever system is found in the neck at the atlanto-occipital joint and in the elbow ...

www.nrpt.co.uk/training/body/levers/second.htm

2nd class levers might not be found in the human body, but we still use them on a day to day basis. To find out more about these and other levers your body uses ...

www.exrx.net/Kinesiology/Levers.html

Levers | First | Second | Third | Length | Variable ... Note: shovelling and rowing actions can also be first class lever systems if the hand closes to the force ...

.ask.com/youtube?q=2nd+Class+Lever+Systems&v=eTa2EFd3JF0
Sep 28, 2013 ... Give anatomical examples of each class of levers. Explain why the second class lever at the ankle joint is the most suitable for its function.

health.uottawa.ca/biomech/courses/apa2313/statics2.pdf

Lever system consists of: • lever. • fulcrum. • load. • force. • Three classes of levers . 1. first class (a) - pry bars, crowbars. 2. second class (b) - wheelbarrow.

www.slideshare.net/mteast12/levers-23617914

Jun 28, 2013 ... Examples within the body 1st class 2nd class 3rd class Lengths of levers ... Identify and name the lever system • E.g write down 3rd class.