4b73950a_all_the_bones__notes
[feature] head [bone] radius [description] the rounded proximal end of the radius [notes] 
it has a smooth; rounded surface for articulation with the ulna; the head of the radius is encircled by the annular ligament (4/5 of a circle) and the radial notch of the ulna (1/5 of a circle)
all the bones
notes