Your heart is an amazing organ. It continuously pumps oxygen and nutrient-rich blood throughout your body to sustain life. This fist-sized.
Some changes in the heart and blood vessels normally occur with age. to be slightly different than the ECG of a healthy younger adult.
The heart is shaped something like a cone, with a pointed bottom and a round top. It is hollow so that it can fill up with blood. An adult's heart is about the size of .