The story for kids
These are red blood cells. Their shape looks like a little pancake that's thin in the middle. They pick up oxygen from the lungs and carry it to every part of the body, to the brain, the hands, and the feet. One drop of blood has millions of red cells.
Facts
- Red blood cells carry oxygen to every part of the body.
- They are shaped like a doughnut that is thin in the middle.
- A single drop of blood holds millions of red blood cells.
Numbers
- Size
- ~0.007 mm
- Lives in
- In the blood
- Job
- Carries oxygen
- Lifespan
- ~4 months