De-oxygenated blood enters the heart via the
A) superior and inferior vena cava.
B) aorta.
C) right atrium.
D) left atrium.
Question 2
Recall Michael's Student Story in the chapter. By exercising and following a healthy diet, Michael is reducing his risks for
A) diabetes.
B) cardiovascular disease.
C) cancer.
D) All of the answers are correct.