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Your heart

Just for a second, place your hand over your heart and feel it thumping. The heart is the body’s engine room, beating continuously as it pumps blood around the body.

This remarkable organ is a true lifelong friend – all it asks in return is nutritious blood to pump around your body. Beating around 40 million times a year, each beat pumps around 0.15 litres (0.25 pints) of blood in and out of the heart – a staggering 9100 litres (2000 gallons) a day, or 227 million litres (50 million gallons) in a lifetime.

How your heart works | British Heart Foundation
Heart age calculator | NHS
Human heart | Wikipedia

How your heart age is key to heart attack or stroke risk | BBC | 4 Sep 2018

How the heart the works | BUPA | 15 Aug 2013 | 3m 3s