This is the free basic version of online Flash diagram of human facial muscles. Highlighting each muscle name will show said muscle on a face. The face can be overlaid with the image of a skull or muscle diagram, with selected muscle in highlight. The full, purchased version goes further to demonstrate which muscle go into play in which expression.
http://www.artnatomia.net/uk/artnatomy2014.html
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Full-body, digitally illustrated, anatomy diagram. First grouping is by system - skeleton, muscle, digestive, nervous, etc. Each system is then further divided into subgroups, then again into sub-parts. This collection of diagrams go as detail as tooth and nails.
http://www.innerbody.com
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An immense image collection of anatomy illustration (non-digital), cross section diagram, and even first-aid instruction. The illustrations range from general, full-body (as in a whole leg) to parts.
http://www.anatomyatlases.org
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Historical illustrations of anatomy in many styles, geographical background, and intended use - from scientific accurate to not at all. Could be both reference, study material, or inspiration.
http://www.nlm.nih.gov/exhibition/historicalanatomies/home.html
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Interactive anatomy diagram aimed at sculptors - digital and traditional (includes diagram for setting up armature stand and wire frame).
http://www.anatomy4sculptors.com
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