Anatomy: Drawing Muscle Groups

Drawing the human anatomy accurately is very important for an artist. It is good practice to understand where muscle groups are placed and how they move. This is especially important when creating an animation of a person moving. 

I have been drawing various muscle groups in order to understand them better.

0.5mm Mechanical Pencil and 6B pencil.

Here you can see how I have drawn out and labelled part of the chest and the right arm.