Step 6: Extend the line at the bottom so that it forms a circular shape and creates a goofy open mouth. Add two curved lines inside for the gorilla's tongue and shade the top part of the open mouth.
Step 7: Draw a curved line under the mouth for the bottom lip. Add a long, curved vertical line above the gorilla's mouth to emphasize the length of the top lip.
Step 8: To the right of the muzzle, draw a series of jagged lines for the fur on the gorilla's face. Draw a few more jagged lines farther right and add a short, curved line for the ear.
Step 9: Draw a series of short strokes above the brow for the head. The top of the gorilla's head should be made up of short lines sticking up to form sort of a tip.
Step 10: Draw a long curved line to the right of the face for the shoulder. Make the top part jagged for the fur. Draw a long line below for the top part of the gorilla's arm. Add a shorter line farther to the right for the upper arm's other edge.