The aorta is the largest artery in the human body. in the average adult, the aorta attains a maximum diameter of about 1.18 inches where it adjoins the heart. what is the maximum diameter of the aorta in centimeters? use the conversion equivalency of 2.54 cm (centimeters) = 1 inch. a. 21.525 cm b. 29.972 cm c. 2.1525 cm d. 2.9972 cm