Full Integumentary System of the Arm and Hand Description
[Continued from above] . . . protect the fingertips from injury and also enhance the delicate movement and sensitivity of the fingertips, although the nails themselves have no nerve endings.
The integumentary system is made up of the skin and its appendages (such as the nails and the hair). Its primary function is to protect the body from damage; it is also involved in temperature regulation and in the sense of touch. Upon exposure to sunlight, the integumentary system is also the primary vehicle for synthesis of vitamin D.