How to build your own working model of the heart (cardiovascular system)

Our heart, a universally recognised symbol of love, kindness and compassion. The heart is one of the hardest-working organs in your body after all it is responsible for pumping blood throughout a vast array of blood vessels, spending...

We've learned about the structure and function of the heart, but what does it really look like in there? What would it be like to be a red blood cell, and swim around, from atrium to ventricle, in and out the major arteries and veins?...