Extrusions for cranium
Still an extrusion for cranium.
A last series of extrusion for the top of cranium.
To build these faces to close cranium.
Add vertexes with Cut Edge.
The finished cranium. Note that there are only rectangular faces (quad).
Extrusions for the jaw and the chin.
To build the faces of the chin with Create Face.
More 3D Graphics: 
