What are the three classes of drugs affecting the hematopoietic system?

Which of the following mental illness does not begin during adolescence? a. post-traumatic stress disorder b. obsessive-compulsive disorder. c. schizophrenia. d. addictions

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system

Second hand smoke can be almost as harmful as smoking. true or false?