sending messages to target cells to control organ functions
Explanation:
producing white blood cells is usally handeled by another organ system
exchanging oxygen and carbon dioxide is the respiratory job
receiving information from the environment and responding to it, is probably the communications of the integumentary system along with the nervous ssytem
Answer:the second paragraph is where we all get the moral of what the reader has written down and in the third paragraph we all get the conclusion of the topic but iam not so sure