How can you tell which side of the heart is the ventral surface?

How can you tell which side of the heart is the ventral surface? a. You can tell which side is the ventral surface because of the left pulmonary vein- the vein will be facing upward.

answer; i do believe the correct answer is (25) times faster;

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.