Healthline BodyMaps: The First Human Body 3-D Visual Search Tool

How well do you know your own body? Unless you're a healthcare provider, you're probably hazy on anatomical details, such as the number of bones in the adult skeleton (213), how much blood the heart pumps per day (at least 2,500 gallons), and the strongest muscle relative to its weight (the masseter, the jaw's chewing muscle, which can close the teeth with a force of up to 200 pounds on the molars).