how big is an average heart
The heart is cone-shaped, with its base positioned upwards and tapering down to the apex. An adult heart has a mass of 250â350 grams (9â12 oz). The heart is typically the size of a fist: 12 cm (5 in) in length, 8 cm (3.5 in) wide, and 6 cm (2.5 in) in thickness. Well-trained athletes can have much larger hearts due to the effects of exercise on the heart muscle, similar to the response of skeletal muscle.