Journeys: Blood. Stop 6
First aid
The body needs help! Drag a platelet to the scratch and a leukocyte to the germ.
The platelets stuck together and closed the scratch.
The leukocyte swallowed the germ!
Wrong helper! Platelets patch scratches, and leukocytes catch germs.
Every moment, blood carries helpers all around the body. That's why scratches heal and illnesses pass.