Step 10: Use the oval as a guide to draw the rest of the gorilla's head. Draw a bump above the left eye for the big brow. Make the top of the gorilla's head taller and use quick, short strokes to indicate hair. Draw the rest of the head using quick, short strokes to indicate the thick hair.

Step 11: Draw more lines inside the gorilla's face for extra detail. Draw a couple of lines on the forehead to finish the thick brow and add more quick, short pencil strokes inside the gorilla's face for the hairline. Draw a few more wrinkles and folds of skin around the gorilla's eyes and nose.

Step 12: Using the lines as guides, draw the gorilla's arms and hands. Draw lightly at first to get the structure right. When you're happy with what you have, go ahead and darken it. Gorillas are very strong, so draw a few bumps along the arm to indicate the muscle structure. Make the shoulder big and round. The middle of the arm, and the bottom is thick again. Use quick, short pencil strokes as you darken the shape to represent hair. Gorillas walk on their knuckles. Draw a few curved lines at the bottom for the folded fingers. Draw the gorilla's arm on the other side the same way. First draw a light sketch for the basic structure, then darken it using quick, short pencil strokes. Make the gorilla's forearm thicker. The top of the arm and the bottom should be thinner. Draw the hand at the bottom. Only the index finger and thumb are visible because of the angle.

Step 13: Now use the other lines as guides to draw the gorilla's legs. Remember to draw lightly at first. Darken the lines once you get the structure right. Bend the leg slightly near the middle and add a small line to indicate where the knee is. Draw the five toes at the bottom using a few curved lines. Draw the leg on the other side using the same technique.

Step 14: Draw the rest of the gorilla's body by using the remaining lines as guides. Draw a few more bumps along the way for a more organic and less rigid feel.