The weight of a child’s heart is not the same as that of an adult’s heart. The weight of a child’s heart is about 25g, which is proportional to the whole body weight, accounting for about 0.8% of the body. As the heart grows older, the weight of the heart will gradually increase, with a heart weight of about 60g at the age of two, 120g at school age, and 300-400g at puberty, gradually reaching the weight of an adult. The heart plays a very important role in the human body and is the main organ that supplies blood to the whole body. The weight of the heart varies from person to person and is related to the proportion of the human body. The adult heart accounts for only 0.5% of the body, and the human heart is fist-shaped, with left and right atria and left and right ventricles, protected by the pericardium.