Image courtesy ZooFari.
Some facts about the human heart:
- It is the size of a fist.
- The heart is like a double pump - the right side collects de-oxygenated blood, while the left side collects oxygentated blood.
- The heart is divided into four main chambers.
- The double membrane of the protective sac surrounding the heart is filled with pericardial fluid which nourishes the heart and prevents the heart from shocks.