Draw two lines that will mark the top and bottom of the ear.
Start by drawing the upper part of the ear.
Next, divide the ear into three sections. In the bottom third, draw the earlobe.
Now, draw the inside of the ear, like this.
This curve will fill two thirds of the ear. In the top third, draw a curve toward the inside.
Now, let's draw the internal structure of the ear and add depth.
Draw lines to show depth and add some shadows.
Start by filling in the darkest parts.
Now, gradually add contrast.