Which of the following describes how the skin of the integumentary system and the bones of the skeletal system work together in the human body? a. the skin absorbs nutrients from the external environment, and the bones transport them around the body. b. the skin takes in oxygen from the external environment, and the bones convert it into carbon dioxide. c. the skin attaches to the bones of the body and relaxes or contracts in order to allow the human body to move. d. the skin protects the body from the external environment, and the bones protect the internal organs.(the answer is d! )