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''Fingers of the human left hand'' The finger is any of the Digit s of the Hand in Human s and other Species such as the Great Ape s. The grace of the fingers is not sacrificed to their Dexterity due to the placement of their Muscle s in the fore Arm , with motion communicated via long Tendon s which may be observed on the back of the hand. A notable exception is the Thumb , with its Flexor and Rotator s comprised in the hand itself. The Bone s of the fingers are called '' Phalanges '' (singular ''phalanx''); the thumb has two phalanges, and the other fingers have three. The fingers' names in English are shown below, from the most Radial to the most Ulnar : # Thumb # Index Finger , pointer finger, or forefinger # Middle Finger or long finger # Ring Finger # Little Finger or pinky finger ANATOMY OF THE FINGER In Anatomy , the thumb is the first finger and the little finger is the fifth finger. Thus ''the third finger'' means the middle finger in anatomy, not the ring finger as in daily English. There are three bones in each finger called the proximal phalanx, the middle phalanx and the distal phalanx. Each finger has three joints. The first joint is where the finger joins the hand. This joint is where the bones that form the palm of the hand, the metacarpals, join with the first bone of the finger, called the proximal phalanx. The bone protruding from this joint when the fist is clenched is commonly referred to as the Knuckle . The second joint is the '''proximal interphalangeal''' joint, sometimes called the PIP joint for short. The last joint of the finger is called the '''distal interphalangeal''' joint, or DIP. Each of these joints is covered with articular cartilage. Articular cartilage is the smooth spongy material that covers the end of bones that make up a joint. The cartilage allows the bones to slide easily against one another as the joint moves through its range of motion. Relative to much of the Skin of the Human Body , the fingertips have a high concentration of Nerve Ending s, equipping them as centers of Tactile Sensation ; Touch ing something or someone is often done with the hands and in particular the fingers. An important application of this capacity is in the ability to read Braille . Additionally, prehension is enhanced by the presence of the ridges and whorls known as Fingerprint s. Each finger is protected at its dorsal terminus by a Fingernail (Latin ''unguis'', ''unguiculus''). In infants, the fingertip is one of the few tissues in the human body capable of full Regeneration , although this ability disappears after about age six. {Link without Title} SEE ALSO
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