Summary
An Operation Ouch cardiovascular-system compilation. A deep dive into blood -- what it's made of, the jobs it does, and why it's red. Free on the official Operation Ouch YouTube channel.
Viewer safety
Ages 9+
Real medical footage with a little blood and a few injuries -- preview before showing.
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Our rating is a quick teacher-to-teacher guide — preview before showing.
Teaching resources
Discussion questions
Discussion
Blood is more than red liquid -- it's a busy mix of parts, each with a job.
- What different parts make up blood?
- What are some jobs blood does for the body?
- Why is blood red?
Quick work-a-long
Vocabulary: blood, cells, oxygen, plasma, clot.
Try it: Name three jobs blood does. Draw a drop of blood and label one part.