Nice to meet you <a href=" http://antonmccarthy.com/prescription-accutane.pdf ">accutane online best price</a> His sheet recording the bones and muscles of the arm provides a good example. This page, which meticulously presents the different components of the forearm, including the radius and ulna bones and the biceps, is shown alongside an animation that demonstrates how the muscles contract and relax in order to make the arm flex and rotate. Comparing the two, we realise that Leonardo was not interested simply in recording what he saw. He also wanted to understand how the nuts and bolts of our bodies actually function.