Original version

BBC World Service News Internet

CrowdScience

Documentaries

Factual: Science & Nature

Factual: Science & Nature: Science & Technology

Answering your questions about life, Earth and the universe

We take your questions about life, Earth and the universe to researchers hunting for answers at the frontiers of knowledge.

BBC World Service Australasia

BBC World Service schedule for American satellite radio and the Caribbean

BBC World Service Americas and the Caribbean

BBC World Service

BBC World Service South Asia

BBC World Service Online

BBC World Service Europe and the Middle East

BBC World Service East Asia

BBC World Service East and Southern Africa Schedule

BBC World Service East and Southern Africa

BBC World Service West and Central Africa Schedule

BBC World Service West and Central Africa

CrowdScience: What’s the point of blood types?

Discussion & Talk

GettyImages-641133986_crop.jpg

26/06/2020 GMT

What’s the point of blood types?

BBC World Service - CrowdScience, What’s the point of blood types?

We, like most animals, have a variety of different blood types. But what are they for?

Humans, like many animals, have blood groups. We can be classified by our cell markers, which help sort our own tissues from nasty invaders. But why do we have different types?

If you put one person’s blood into another person , sometimes it’s fine and sometimes it’s a death sentence. 

French physician Jean-Baptiste Denis discovered  this when he performed the first blood transfusion back in 1667. He put the blood of a lamb into a 15-year boy. The teenager survived but Denis’s third attempt killed the patient and led to a murder charge.

In 1900, Austrian doctor Karl Landsteiner discovered the reason for this lottery – blood types. The red blood cells in our bodies are decorated with different marker molecules called antigens. These define us as A, B, AB or O blood type. And this is just one of 38 different systems for classifying our blood. CrowdScience listeners have discovered that we aren’t the only animal with blood types and want to know more. 

Dogs have 12 different blood groups, so how do they cope when they need a transfusion? CrowdScience meets some very good dogs who donate a pint to the pet blood bank in return for a toy and a treat. Each pint saving up to 4 other dogs’ lives.  

We also hear how examining our blood types can tell us more about our links to our ape-like cousins and how the human species spread around the world. And what about the future of blood types – can we use science, and animal blood to get around the problems of transfusions?

Producer and Presenter: Marnie Chesterton
Photo: Red Blood Cells. Credit: Getty Images

Accessibility links

Programme Index

CrowdScience

What’s the point of blood types?

Genres

Formats

Brand

BBC World Service News Internet

About BBC World Service