The Circulatory and Respiratory Systems

In this topic, you learned about the different organs and tissues that make up the circulatory and respiratory systems. You gained information about what takes place each time you breathe, a complex process that happens millions of times a day without your conscious effort. You also learned about the journey of a blood cell as it travels through the heart and body systems, connecting the respiratory system to the circulatory system. In addition, you explored several ailments that affect the circulatory and respiratory systems.