The human finger is made up of three bones called phalanges, with the thumb having only two bones.
Fingerprints are unique and can be used for identification. They are formed by the ridges on the skin of the fingertips.
The fingers have a high density of nerve endings, making them very sensitive to touch.
The index finger is typically the longest finger on the hand, while the ring finger is usually the shortest.
The fingers are controlled by muscles in the hand and forearm, and are essential for many fine motor tasks, such as writing and playing musical instruments.
The thumb is the most opposable finger, meaning it can move and touch the tips of all the other fingers.
The fingertips contain sweat glands that secrete an oily substance, which helps to protect the skin from damage and improve grip.
The nails on the fingers and toes are made of a protein called keratin, and they grow at an average rate of 3mm per month.
The fingerprints of identical twins are not identical.
Some people have extra fingers or toes, a condition called polydactyly. This is usually due to a genetic mutation.
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