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← The Human Body

Your Heart and Blood

Medium⏱ 20 min
An anatomical model of the human heart
📷 moonjazz · Public Domain

Your is a about the of your . It all around your , day and , for a . Even while you , your on — it is the most you have.

Make a and it , then let go. That is just like a . Each your , it out; each it , it up again, for the . That is what you as your .

A child squeezing their hand into a fist, like a heartbeat
📷 Internet Archive Book Images · No restrictions
✨

Your around 100,000 every day. Put your on your — can you it?

and to every of your and . It through called — a so it could around the many ! this , your would have no to do their .

A diagram of blood vessels carrying blood around the body
📷 Edwin Ray Lankester, Q. J. Mic. Sci. vol. xxxiv., 1893 · Public domain

🧩 Follow a drop of blood on its journey.

  1. Blood returns to the heart again
  2. Blood delivers oxygen around the body
  3. Blood picks up oxygen in the lungs
  4. The heart pumps blood out

Your does two at , because it has two . The to your to . The that and it out to the of your . A the the two from .

💡

and makes your — it , just like other get when you use them!

🔗 Match each part of the system to what it does.

  • Heart

  • Artery

  • Vein

  • Oxygen

Some is your and only red when you . That is a ! Your is red. It through your only because of the way through you. of is red, and is a red.

✨

A much than an . As you , your .

✍️ Fill in the heart facts.

The is a that all around your . The that are called .

after your is and fun. like , and makes it . of and , , and all your for your .

Children running and playing outside to keep their hearts strong
📷 Acabashi · CC BY-SA 4.0

🗂️ Sort each habit: good for your heart, or not so helpful?

  • Running and playing

  • Eating fruit and vegetables

  • Getting plenty of sleep

  • Sitting still all day

Quiz time! 📝

Heart Quiz

Question 1 of 5

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What does the do?

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