The Science of You: Why We Bleed 🩹

Sleep Tight Science - A Bedtime Science Show For Kids

Sleep Tight Media

Kids & Family, Education For Kids

4.4 • 738 Ratings

🗓️ 7 January 2026

⏱️ 23 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

In this episode we are going to try and answer the following questions: Why do we bleed when we get a cut, and how does our body know exactly how to stop it? Grown-ups: we value your feedback. Our email and message link are in the episode notes—please send us your child’s questions and thoughts. Sleep Tight!, Sheryl & Clark ❤️👂📖 --- ✨ Want more stories and fewer interruptions? Join Sleep Tight Premium for ad-free listening, bonus bedtime stories every week, and personalized shout-outs for your little ones! Start your free trial now on Apple Podcasts or at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠sleeptightpremium.com⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠. --- Support Us 👉 Join ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠Premium⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ for AD FREE listening and extra bedtime stories! 👉 ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠Sleep Tight Premium⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ is now available in Apple Podcasts! 🎉 ⭐⭐⭐⭐ Leave a review wherever you listen to podcasts, or share our podcast with your friends. 📢 Have an interesting science topic you would like to investigate? Send us an email at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠hello@sleeptightscience.com⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ , and we may feature it in an upcoming show. --- About Sleep Tight Science We’ve got bedtime down to a (Sleep Tight) Science! Sleep Tight Science is an award winning bedtime podcast that makes science accessible and enjoyable for the whole family. Snuggle in and drift off to sleep while learning about science topics submitted by listeners! Designed for curious young minds (but simple enough for grown-ups to understand), Sleep Tight Science uses big words to answer big questions that kids wonder about, like why do we feel icky sometimes and how do our legs help us move? Learn something new about the natural world while drifting off to dreamland. Have an interesting science question or a topic you’re curious about? Email us at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠hello@sleeptightscience.com⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠, and it might just be the focus of an upcoming episode! Dedicated to enhancing the health and happiness of children, Sleep Tight Media helps families replace bedtime struggles with bedtime snuggles. -- Advertising provided by Starglow Media. Learn more about Starglow Media ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠here

Transcript

Click on a timestamp to play from that location

0:00.0	You're listening to Sleep Tight Science.
0:17.1	Did you know your blood is both a delivery service and a repair crew at the same time?
0:25.4	What?
0:26.5	It brings oxygen and food to yourselves.
0:30.4	And when you get a tiny cut, it races to fix the leak.
0:39.5	Hello, friends, and welcome back to Sleeptight Science, a bedtime show that answers your
0:46.2	questions about science.
0:49.9	Have you ever scraped your knee and watched a little drop of red appear on your skin?
0:56.4	For a moment, it looks like your body has a leak, and it does in a way.
1:02.9	But before you even finish looking at it, your body has already started building a tiny repair bridge to seal the opening back up.
1:14.4	Blood is something we all have, flowing quietly through tubes inside us every second of every day.
1:23.7	It's a delivery service, bringing oxygen and food to yourselves.
1:29.3	And when there's a tiny break in one of those tubes, it becomes a repair crew too,
1:36.0	racing to fix the leak before you even notice.
1:41.7	In this episode, we are going to try and answer the following questions.
1:47.7	Why do we bleed when we get a cut?
1:50.7	And how does our body know exactly how to stop it?
1:56.4	We'll start by looking at what blood is made of and why a little bleeding happens when a tiny tube called a capillary opens.
2:05.9	Then we'll follow the repair crew through two fast steps.
2:11.0	First, tiny helpers called platelets arrive to make a quick plug.
2:17.3	Next, stringy threads called fibrin weave through to lock everything in place.
2:24.8	Finally, we'll see how a scab forms on top, your body's natural bandage, while brand new skin grows
	...

Please login to see the full transcript.

Previous episode | Next episode

Disclaimer: The podcast and artwork embedded on this page are from Sleep Tight Media, and are the property of its owner and not affiliated with or endorsed by Tapesearch.

Generated transcripts are the property of Sleep Tight Media and are distributed freely under the Fair Use doctrine. Transcripts generated by Tapesearch are not guaranteed to be accurate.