How do the circulatory system and respiratory system work together to respond to an illness or injury A( increased blood flow kills healthy cells which prevents infection at the site of injury
B( increased blood flow removes infected cells from the body at the site of injury
C( increased blood flow carries white blood cells to the site of the injury
D( increased blood flow allows for an increase in the exchange of oxygen and carbon dioxide at the site of injury

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !