Why We Have Bones And A Skeleton
The human skeleton is the internal framework of about 206 bones that gives the body its shape and lets it stand upright. Bones are hard and stiff because they are made largely of calcium and other minerals, so together they form a strong structure that keeps the body from being soft and floppy.
The skeleton does four main jobs. It supports the body and gives it shape; it protects soft organs, with the skull shielding the brain and the rib cage guarding the heart and lungs; it works with muscles to create movement, because muscles pull on bones and joints let them bend where two bones meet; and inside the larger bones, the soft marrow makes new blood cells and bones store minerals.
Bones also change over a lifetime. A baby is born with around 300 bones, and as a child grows some of these fuse together, leaving an adult with about 206. Understanding the skeleton helps learners see how shape, protection and movement all depend on this living frame.
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Meet your skeletonScience • Your Body Why do we have bones? 🦴 Right now, hiding inside you, is a set of 206 bones working together. We call the whole set your skeleton. Tap Next and let's find out the amazing jobs your bones do every single day. 👉
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Bones hold you upJob 1: Bones give you shape 🧍 Without a skeleton, your body would be soft and floppy — like a jelly! Bones are strong and stiff, so they hold you up straight and give your body its shape. Tap the button to see what happens to a body without bones: Take the bones away! 🫠
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Bones protect youJob 2: Bones are your armour 🛡️ Some bones act like a helmet or a cage to protect the soft, important parts inside you. Drag each bone to the body part it keeps safe. Keep me safe! ⬇️ drop here 🧠 Brain drop bone ❤️ Heart & Lungs drop bone 🔌 Spinal cord (body wires) drop bone Drag a bone 🦴 🦴 Rib cage 💀 Skull 🦴 Backbone Match all 3 to finish!
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Bones help you moveJob 3: Bones help you move 🏃 Where two bones meet is called a joint. Your muscles pull on your bones, and joints let them bend — like a door hinge. Press the buttons to bend this arm at the elbow! upper arm forearm This is the elbow joint 👆 Bend arm 💪 Straighten arm ✋ No joints means no bending — you couldn't walk, wave or even chew!
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The secret jobs insideJob 4: Secret jobs inside your bones ✨ Bones aren't just hard sticks — they are busy little factories! Tap each card to reveal a hidden job. 🩸 Makes blood tap to reveal The soft marrow inside big bones makes new blood cells every day! 🥛 Stores calcium tap to reveal Bones store calcium from food like milk to stay strong. Eat well! 📏 Grows with you tap to reveal Bones are alive and keep growing — that's how you get taller! 0 of 3 secrets found
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How many bones?Fun fact: a bone mystery 🔍 Here's a surprise. Babies are born with about 300 bones, but grown-ups have only about 206. As you grow, some tiny bones join together to make bigger, stronger ones! Quick quiz: How many bones does a grown-up have? 12 206 1000 Wow fact: More than half of your bones are in your hands and feet. That's why they can do so many tricky moves! ✍️👣
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What do bones do?Let's check what you learned 🧠 Tap the ONE job below that bones do NOT do: 🧍 Give your body its shape 🛡️ Protect your brain and heart 🏃 Help you move at joints 👀 Let you see colours Hint: seeing colours is a job for your eyes, not your bones!
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You did it!🎉🦴 Brilliant work, bone expert! Your skeleton is a superhero team of 206 bones. Here's everything it does: 🧍 Shape & support — holds you up so you're not floppy like jelly. 🛡️ Protection — the skull guards the brain; ribs guard the heart and lungs. 🏃 Movement — joints let bones bend when muscles pull. 🩸 Making blood — marrow inside makes new blood cells. 🥛 Storing calcium — keeps bones strong (so drink your milk!). 💡 Take care of your bones: eat calcium-rich food, play in the sunshine, and stay active! Give your skeleton a little thank-you wiggle — it's been holding you up this whole lesson. 😄
Frequently asked questions
- How many bones are in the human body?
- An adult body has about 206 bones. Babies are born with around 300, and some of these fuse together as a child grows.
- Why do we need a skeleton?
- The skeleton gives the body its shape and holds it upright, protects soft organs like the brain and heart, and works with muscles so we can move.
- What is a joint?
- A joint is the place where two bones meet. Joints let bones bend and move, like a hinge on a door, so muscles can pull the bones into action.
- How do bones protect the body?
- Certain bones act like armour: the skull surrounds the brain like a helmet, and the rib cage forms a protective cage around the heart and lungs.
- What is inside a bone?
- Many bones contain soft marrow that makes new blood cells, and bones also store minerals such as calcium, so they act like tiny factories and storehouses.
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