This is a trick question. The proper name for the system of skin is called the Integument. How do you know someone has chicken pox? By seeing the rash on the skin. So the answer is : it forms a rash or vesicles.
The hormones of the endocrine system affect the action of melanocytes and apocrine sweat glands. The integumentary system synthesizes vitamin D, which is active in bone formation controlled by the endocrine system. good