1. Skip to content
  2. Skip to main menu
  3. Skip to more DW sites
ScienceGlobal issues

Blood: How our "liquid organ" runs the body

03:27

This browser does not support the video element.

February 9, 2026

Blood: red, liquid, and always on the move. But is it a bodily fluid? Or an organ in its own right? Either way, we wouldn't be alive without it!

Without our blood, we wouldn't be alive! It transports nutrients, oxygen and heat throughout the body, serves as a communication channel for the brain, fights pathogens, and seals wounds with platelets. Red and white blood cells each play an essential role in keeping the body functioning. Blood comes in eight different types - varying according to antigens and the Rhesus factor. Some are compatible with each other for blood transfusions, while others are not.

What's inside us? Our organs, of course. But they don't always get the attention they deserve. The series "Organized" aims to portray the organs of the human body with 3D animations in a vivid, funny and entertaining way helping viewers of all ages understand their special characteristics and how they work. 

Skip next section DW's Top Story

DW's Top Story

Skip next section More stories from DW

More stories from DW