Ear: Basics
By Rio

Here's the lowdown on ears. Yes, most characters get the simplified ear but it comes in handy to know actual, real anatomy. (hint, hint) This image to the right shows the two most common ears: the first has a hanging lobe and the second has the lobe directly attached. Other than that, the ear has the outer helix which shows up quite frequently in the simplified anime ear.

Full View Quarter View Back View

Above are several views of the ear with the standard ear plus several simplified versions. From the left: full view, quarter view, and back view. The back view has no simplified drawings as it's already as simplified as you can get.