Love the lines in these anatomical pieces by Flickr user doesthepope.  I admire the patience and meditation that goes into intricate, yet free-flowing linework.

If you ever find yourself stuck in a boring meeting or class, try doodling in this type of style.  It’s been found that doodling simple repetitive shapes or shading figures actually increases focus and recall.  Can’t get in trouble for that!

Source:
http://feeds.feedburner.com/streetanatomy/OQuC