Nails are part of which bodily system?

Nails are part of the integumentary system, which also includes the skin and hair. This system serves several critical functions such as protection, regulation, and sensation. The integumentary system acts as a barrier against harmful microorganisms, helps regulate body temperature, and provides sensory information. Nails, specifically, protect the distal phalanx—the tip of the finger or toe—and can also enhance our ability to pick up small objects.

The other systems listed in the question—muscular, circulatory, and respiratory—serve entirely different roles in the body. The muscular system is responsible for movement, the circulatory system manages the transportation of blood and nutrients throughout the body, and the respiratory system is essential for the exchange of oxygen and carbon dioxide. Understanding the function and classification of nails within the integumentary system is vital for various aspects of nail tech practice, including health assessments and proper care techniques.