Finger (longutudinal section): jointed appendage at the end of a human hand (thumb, index finger, middle finger, third finger, little finter).
Epidermis: tissue forming the outer layer of the skin.
Nailbed: part of the nail under the skin, from which the nail grows.
Nail: horny plate on the dorsal surface of the end of a finger.
Dermis: tissue forming the central layer of the skin.
Pad: part of the finger containing the flesh that forms the digital pulp.
Distal phhalanx: third jointed segment of a finger.
Interphalangeal joint (IP): joint between the second and third phalanges.
Middle phalanx: second jointed segment of a finger.

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Like other paired organs (eyes, ears, legs), each hand is dominantly controlled by the opposing brain hemisphere, and thus handedness, or preferred hand choice for single-handed activities such as writing with a pen, reflects a significant individual trait.

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