Match each organ or function with its body system. Skin excretes waste nails kidneys bladder provides exterior barrier

Skin: The skin acts as a barrier against external agents that could affect such as microorganisms, changes in temperature, etc.

Excretes waste: The excretion process, is done mainly by lungs (release of carbon dioxide), kidneys (elimination of excess compounds such as nitrogen) and the skin (sweat regulates temperature but also regulates the concentration of salts within the body)

Nails: It protects the soft tissues surrounding the distal phalanx, but it also exerts pressure over on the digits which allows more precission in the movements.

Kidneys: Eliminate waste from the blood and regulate body fluids, by generating urine.

Bladder: In charge of storing the urine produced by the kidneys, for the urination process to be controlled and not so frecuent.