Respiration/Circulation Review RespirationStructures Breathing Control of breathing rate Lab on respiration Circulation Heart blood flow Blood vessels- veins, artery , capillary Blood cells- RBC, WBC, platelets, plasma Lab on circulation Essay Questions: Respiratory/Circulatory System What happens to your heart rate and breathing rate after you exercise and why? Why is it difficult to breathe after exercising? If you breathe into a paper sack, what would happen to your breathing rate and why? What would happen to your breathing rate if you breathe air that contains only 16% (or 24%) oxygen rather than 20%? Explain how your body responds if your red blood cells lack necessary hemoglobin. Explain what happens in terms of circulation and respiration if you would add 25% more RBC to your blood.