What I Know A. Directions: Choose the letter of the correct answer. Write your answer in your Science journal. Which of the following is the function of integumentary system? It serves as a body covering. b. It serves as the pathway of the blood. It serves as a sense of touch. d. both a and c C. 2. a. How does musculo-skeletal system work together? Muscles are attached to the bones and produce movement by contracting and relaxing. b. Muscles are attached to the skin and produce movement by the help of the epidermis. Muscles are attached to the ribs and spinal column; thus, they produce movement. Muscles are attached to the cartilage, thus producing movement. C.​