N3 sentences explain 2 things we can do to strengthen our circulatory system. make sure you use details in your explanation. explain your answer and use clear examples. do not just write exercise and eat healthy and think your are finished.

Breathing deeply and getting outdoor exercise strengthens our circulatory system by improving the quality of the blood. Oxygen and carbon dioxide are exchanged better.

a. cardiovascular system goes with d. atherosclerosis  

b. digestive system goes with a. cirrhosis  

c. endocrine system goes with b. addison's disease

d. immune system goes with c. mononucleosis

explanation:

b and c would be the answers