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[MUSIC]

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Joan Cartan-Hansen, Host: The 
skeletal system is more than

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just bones.

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It also has cartilages and 
ligaments.

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Cartilage is a strong, smooth 
tissue that helps cover and

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protect joints and bones.

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There are three main types of 
cartilage.

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Elastic cartilage provides 
flexibility and structure.

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You'll find it in places like 
your nose and outer ear.

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Fibrocartilage is found in 
places like your knee and the

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discs between vertebrae in 
your spine.

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It's tough and inflexible and 
designed to reduce friction as

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the joints move.

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And hyaline cartilage is found 
at the end of bones.

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It's slippery and allows the 
joints to move smoothly.

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Ligaments are tough, elastic 
tissue.

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They connect bones to bones, 
and give the joints support.

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Some ligaments restrict 
movement, while other are more

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elastic.

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Now, I should mention 
something about tendons.

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Tendons connect muscles to 
bones and help transmit force.

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Tendons are sometimes confused 
with ligaments.

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So remember, ligaments connect 
bones to bones and tendons

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connect muscles to bones.

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For more information about 
skeletons check out the

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science trek website.

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You'll find it at science trek 
dot org