What is the Size of the Heart?
The size of a human heart is roughly the size of a clenched fist. However, the precise dimensions vary considerably between individuals.
Several studies provide different measurements, highlighting the inherent variability.
- Length: The average heart length is around 11.41 cm, ranging from 3 to 14 cm (Source: Study of the normal heart size in Northwest part of Iranian population). Gray's Anatomy gives a length of 12 cm (Source: Biology LibreTexts).
- Width: The average width is approximately 8.21 cm (Source: Study of the normal heart size in Northwest part of Iranian population). Gray's Anatomy lists the width as 8.5 cm (Source: Biology LibreTexts).
- Thickness: Gray's Anatomy specifies a thickness of 6 cm (Source: Biology LibreTexts).
- Weight: The heart's weight varies significantly, from a minimum of 21 g to a maximum of 593 g (Source: Study of the normal heart size in Northwest part of Iranian population). Other sources state a weight of 7 to 15 ounces (200 to 425 grams) (Source: Texas Heart Institute). The average weight is often cited as being between 280 and 340 grams (Source: Biology LibreTexts).
It's important to note that these are averages, and individual heart size can vary depending on factors like age, sex, and overall body size. An enlarged heart (cardiomegaly) is a condition where the heart is larger than normal, which may be caused by underlying health issues (Source: Mayo Clinic).
Shape and Location
The heart's shape resembles a pinecone, broader at the base and tapering to a point (apex) (Source: Biology LibreTexts). It's located in the chest, behind and slightly to the left of the breastbone (Source: Better Health Channel).
