The heart is situated in the ____ surrounded by the pericardial sac.
a. peritoneum
b. mediastinum
c. pleura
d. myocardium
Question 2
The reconstruction of a diseased coronary artery by inserting a small balloon through the aorta and into a coronary artery is a procedure known as ____.
a. atherosclerosis
b. stenosis
c. anastomosis
d. angioplasty