Skip to main content
Red blood

Petite Question: Why is blood red?

What is "La Petite Question"? It's that little question that's on your mind about current affairs or general knowledge, explained by researchers, teachers, doctoral students... from Aix-Marseille Université. For everyone!

Why is blood red?

Do you know why blood is red? And what purpose does it serve?

Pascal Arnoux, researcher at the Biosciences et biotechnologies d'Aix-Marseille laboratory (AMU/CNRS/CEA) explains!

Aix-Marseille University (AMU) follows CNIL guidelines

The platform that broadcasts this content conditions its reading to the deposit of tracers in order to offer you targeted advertising according to your navigation.

By clicking on 'I authorize', the cookies will be deposited and you will be able to view this content.

I authorize
Production: Christelle Seguin & Hortense Nicolet - Production: Télé AMU - Direction de la communication Aix-Marseille Université - Online: February 2020

You can find all the "Petites Questions Scientifiques" in the dedicated playlist on the Aix-Marseille Université Youtube channel.