Mateo is doing a presentation on the human heart. What fact should he include in his presentation?

The human heart is approximately the size of the person’s fist. It has four chambers, not eight, and it is part of the circulatory system rather than the digestive system. It lies near the middle of the chest, slightly to the left, so the correct fact is “It is approximately the size of a fist.”

AI-written and checked against the verified answer.