Draw a simple oval for the skull
Add a vertical line down the center of the face
Sketch the jaw beneath the skull
Draw two eye sockets
Add a nose cavity
Draw the rib cage as a rounded cage shape
Add the spine as a curved line down from the skull
Sketch the pelvis below the rib cage
Draw the upper arms extending from the shoulders
Add the forearms and hands
Draw the upper legs extending from the pelvis
Add the lower legs and feet
Refine the joints at the shoulders, elbows, hips, and knees
Add finger bones and toe bones
Erase extra guide lines
Darken the final outline
Add shading if desired