Bones of the skeleton. Artwork from Juan Valverde de Amusco's textbook Anatomia del Corpo Humano (Anatomy of the Human Body), published 1560. Fig. I is a view of the spine, from the left side. Figs. II are front (upper) and back (lower) views of the sacrum, or fused vertebrae at the base of the spine. Fig. III is the coccyx. Figs. IIII are (from left to right) side, back and front views of the scapula or shoulder bone. Fig. V is the clavicle or collar bone; Figs. VI, VII and VIIII are views of the humerus, radius and ulna, the bones of the arm. Fig. VIII shows the bones of the hand, and Fig. X the bones of the feet.