CHAPTER 37 – THE CIRCULATORY AND RESPIRATORY SYSTEMS

A. fight infection. B. maintain blood pressure. C. transport oxygen to tissues. D. clot blood at damaged sites. Which of the following are needed to begin blood clotting? A. Red cells and platelets. B. White cells and red cells. C. Platelets and plasma proteins. D. White cells and plasma proteins. A person complains of constant fatigue and a ... ................
................