KERMOAL / BSIP / SCIENCE PHOTO LIBRARY KERMOAL / BSIP / SCIENCE PHOTO LIBRARY
Finger bones and ligaments. Artwork showing the bones (cream) of a finger, the cartilage (bright blue) between them, extensor tendons (grey and green) and ligaments (loops) associated with the tendons. This side view has the back of the finger at left, the underside at right, and the tip of the finger at top. At bottom is the finger's metacarpal bone. Above this are the finger bones (phalanges): the proximal phalanx, the intermediate phalanx, and the distal phalanx. Extensor tendons connect to muscles in the forearm used to flex and extend the fingers. They are sheathed by looped ligaments called annular pulleys.
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