The index finger is also heavily involved in signaling and communication. It is often used in gestures such as pointing at something to indicate interest or to give directions. In many cultures, the index finger is used in gestures of emphasis or to express meaning in conversation. Its prominence in communication is one reason why the index finger is so important in daily life. The anatomy of the index finger is similar to that of the other fingers, with three bones known as phalanges.

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