If I graze my knee every day, would I eventually run out of blood?

As always, a deceptively simple question that opens the door to a hilarious exploration of how our bodies make blood. Find out what happens when you scrape your knee and how the body keeps itself cleverly supplied with just the right amount of blood cells. Most importantly, find out just how newly-built blood cells manage to escape from inside the bone marrow!

Helen and Dr C are joined by Dr Mafalda Araújo Pereira, a researcher who studies blood stem cells — the tiny powerhouses responsible for producing all the different types of blood cells in your body. Mafalda also treat us to Dr C's favourite bedtime story ever!

To get in touch with Mafalda, email mafalda.araujo@finsenlab.dk

To get in touch, email hello@talkingofscience.dk