I blinked my little blood drop eyes open. I must have dozed off after my amazing journey. Let me think back...

It all started right here in the lungs. I got a big hug of air, which gave me lots of oxygen. Then, the heart gave me a big squeeze, and whoosh! I was off on a super-fast ride through blood vessels. I went everywhere - muscles, brain, even toes!

I gave away my oxygen to help the body. But I also picked up some yucky carbon dioxide. When I got tired, I came back here to the lungs.

Now, I'm letting go of all that carbon dioxide. Phew! It feels good to get rid of it. And I'm getting ready to pick up more oxygen for another exciting trip through the body.

Being a blood drop is the best job ever! I get to help the whole body and go on amazing adventures every day!

Then, I travel through a blood vessel to the heart. The heart is like a big pump that helps me on my way. It gives me a squeeze, and I'm pushed through another blood vessel.

Now I'm zooming through the body, delivering oxygen to all the parts that need it. I visit muscles, the brain, and even your toes! As I give away my oxygen, I pick up waste called carbon dioxide.

When I'm done delivering oxygen, I'm tired and need to go back to the lungs to get more. So, I travel through another blood vessel back to the heart. The heart gives me another big squeeze, and I'm on my way back to the lungs.

When I get to the lungs, I let go of the carbon dioxide and pick up fresh oxygen. Then, I start the whole journey all over again! It's like a never-ending roller coaster ride, and I love every minute of it!