Even anime or cartoon artists need to know the anatomy of the face. Here are some examples. TOP VIEW: the line across the head marks the ears & the line down the center marks the nose. PERSPECTIVE VIEW: The line across the center of the eyes goes to the top of the ears. FRONT & SIDE VIEW: 1/6 area is Top of Head to Hairline. First 1/3 is Hairline of Forehead to Eyebrows. Second 1/3 is Ears & Eyebrows to Bottom of Nose. Third 1/3 is Mouth halfway between Bottom of Nose to Bottom of Chin. Remember on Front View there is an eye width at bridge of nose, left & right side of face (on each side of the eyes). TIP: These proportions are average and can vary from person to person. These, if you want to call them, "exercises", help you to "see" around and through the forms, making you a more successful artist, whether anime or realistic.