A finger is one of the five digits on a human hand, primarily used for grasping and manipulating objects. Each finger consists of bones called phalanges, which are connected by joints, allowing for movement. The thumb is often considered a separate digit due to its unique opposability, enabling a strong grip. Fingers are covered with skin and have a rich supply of nerves, making them sensitive to touch. They play a crucial role in various activities, such as writing, typing, and playing musical instruments like the piano. Proper finger function is essential for daily tasks and overall hand coordination.