Final answer:
The small finger is made up of phalanges and it is likely that one of these bones was injured.
Step-by-step explanation:
The bone that was most likely injured in this case is the phalange. The phalanges are the small bones that make up the fingers and toes. In this instance, the small finger refers to the fifth digit, which is made up of three phalanges: the distal phalanx, the middle phalanx, and the proximal phalanx.
Learn more about Bone injuries in the human body