Sci Fri: Pumping Blood

Our first task was converting 5 litres into cups (approx. 20)

Our second was to fill a bowl with 20 cups of 'blood'.

Our third, to beat the clock; 5 litres of blood in one minute!

Then we thought about our heart, pumping blood at that rate, all day, every day.
And we were tired after one minute!

Science experiment courtesy of 'Me & My Body'.