How Your Bones and Skeleton Works

How Your Bones and Skeleton Works


KidsHealth presents How The Body
Works with Chloe and the Nurb. [SINGING] Oh, the tibia’s
connected to the femur. The femur’s connected
to the ilium. Ooh, hello there, Chloe. Nurb. Where are you? I’m the gelatinous blob
lying on this rock. Oh. Nurb, where are your bones? Being cleaned, of course. Once a year, we Nurbs
send our bones out for some serious scrubbing. And today’s my
bone-cleaning day. Well, technically yesterday
was my bone-cleaning day. The cleaning service
temporarily misplaced my bones. At least they found my skull. [SINGING] The fibula’s
connected to the tibia. The– I wish I could help you,
but I don’t know anything about bones. Tut. Don’t know about bones. Don’t know about bones! Do you like to talk? Eat? Swim? Dance? Like my dance? It’s great. And yet I like all those things. Then you need to
know about bones. Or as they’re known to fancy
people, the skeletal system. And there’s only
one place for us to go to learn about the bones. The Boneyard. As creepy and awesome
as that sounds, how are you going anywhere? Simple– strap me
on like a backpack. I should have known. All right, Jelly Nurb. Let’s do this thing. Bone lesson number one– the
bones have three main jobs. They allow your
body to move, they protect your delicate
vital organs, and they produce blood
cells in bone marrow. Speaking of moving,
I have to say, you are surprisingly
comfortable to wear. Why, thank you, Chloe. I get that a lot. Bone lesson number two–
bones are made of calcium. And when you consume
calcium-rich foods, like milk, your bones are
very happy things. Ooh, Nurb, look. The Boneyard. [SINISTER LAUGHTER] Well, this isn’t
exactly what I expected. I told you, bones
are happy things. Press me on that
lovely rock over there and I’ll teach you
about bones and help you through the
skeleton-building process. The what-building process? We’re here to build me a
temporary skeleton, of course. That sounds surprisingly fun. Direct away. Great attitude, Chloe. High five. Aw. Take this blueprint
and off you go. And don’t worry, it only takes
206 bones to make a skeleton. Challenge accepted. Now there are two
different kinds of bones. There are axial bones
they keep you upright, like ribs in the spine. And appendicular bones
that help you move, like the bones of
your arms and legs. Axial and appendicular. Correct. And that thing that lets the leg
move back and forth is a joint. Joints connect bones
to help them move. That one’s a knee joint. Woah, Nurb. What’s this bone? It’s tiny. That, my dear Chloe,
is one of the ossicles. There are three of
them in your middle ear and they’re the smallest
bones in your body. So I have to find two more? Game on. Chloe, if I could applaud your
adventurous spirit right now, I would. But unfortunately, there
are no bones in my hands. Ooh, this one’s
got a crack in it. That is called a fracture. Bones fracture, or
break, all kinds of ways. Sometimes they’re
very small breaks, like hairline fractures. But sometimes, the fracture
can be more serious. Yikes. Don’t worry, bones
are living things. And they fix themselves
pretty quickly. New bone cells grow
on the broken ends to fuse the two
parts together again. Sometimes you need
a cast to keep the pieces of the bone in place
so they grow back correctly. I think this baby is done. How does it look? Oh, Chloe. It’s beautiful. Try it on. Wow, you look great. You think so? I’ve never been so tall. It might be a
little hard to walk. I think I may have an idea. [SINGING] The ilium’s
connected to the spinal column. The spinal column’s
connected to the rib bones. The rib bone’s
connected to the–

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