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The Skeletal System Lesson for Kids: Facts & Functions

Instructor: Rebecca Gillaspy

Dr. Gillaspy has taught health science at University of Phoenix and Ashford University and has a degree from Palmer College of Chiropractic.

Your skeletal system is all about your bones. Bones give your body its basic shape, help you move and protect delicate organs. Bones also do weird things, like make blood cells and allow us to hear! Learn fun facts about your skeletal system.

Fun Facts about Bones

Did you know that your bones make most of your blood cells? Did you know that you wouldn't be able to hear if you didn't have bones? These facts might seem weird, but they're true! Underneath the hard surface of your bones is a soft substance called bone marrow. Bone marrow is the place that most of your blood cells are made. Meanwhile, your ears contain the three smallest bones of your body. They transfer sounds from your eardrum to your inner ear so that you can hear! These are just a couple of the facts you'll learn as we explore the functions of the skeletal system.

Bone Marrow in the Arm Bone
bone marrow

Skeletal System

Your skeletal system is all about bones. When you're born, you have over 300 bones. By the time you become an adult, the number of bones in your body drops to 206. But you don't lose bones as you get older. Babies just have more bones because their bones haven't fused yet. At birth, your bones have soft patches of cartilage. This cartilage allows your bones to grow. When you're an adult you are done growing, so the bones fuse together.

Support

Your bones support your body, kind of like the framework of a house. Did you ever see a house being built? One of the first things they do is build the frame by putting up the beams for the walls and the roof. This framework gives the house its basic shape, just like your bones give your body its basic shape.

Movement

Joints connect the bones together to help them move. Every bone in your body is connected to another bone, except one: the hyoid bone sits by itself just below your chin. It acts as an anchor for your tongue. Can you touch your tongue to your nose? That wide amount of movement is thanks, in part, to your hyoid bone!

Hyoid Bone
Hyoid Bone

The bones and joints of your skeletal system allow your body to bend and move, but you don't tell your bones to move. Muscles attach to your bones. When you tell a muscle to contract, it gets shorter and pulls on the bone.

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