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Rules of the Skeletal System: Outtake from Introduction to Functional Anatomy

The skeletal system is the body's hard, rigid framework made up of bones, ligaments, tendons, and cartilage. It supports, shapes, and protects the body, and forms the main structural support for the body's entire movement system. This system also provides structural support for the soft organs within the body and serves as a storehouse for calcium and other essential minerals. The rules of the skeletal system establish how bones and joints interact with each other to allow movement. These rules involve

Transcript

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Let's talk about the skeletal
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system. Basic rules of the skeletal
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system, anybody know what the KISS principle is? My mama told me "keep it
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simple, stupid." In this classroom we use the PC version: keep it short and simple.
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Fair enough? A joint is where two bones meet. It's true, have you ever really
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thought about it though? A joint is just where any two bones meet. Any two
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bones come together, it creates a joint. That's it. It's not more complicated than
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that. There's actually bones in your skull that don't even move, but
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these two bones coming together creates a joint. Still a joint. Muscles pull bones
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which then move joints. All motion in the body happens at a joint usually because
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a muscle pulled on it. Seems simple enough. The structure of the joint
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dictates range of motion. Where do most people get confused on this one? I think
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a lot of people think muscles are what dictate range of motion. Muscles can
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restrict range of motion but you got to remember that the shape of the joint
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itself probably has the most impact on what type of range of motion you're
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going to have at that joint. I don't care how flexible your bicep becomes, your
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elbow isn't moving that way. You only have so
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much range. It doesn't matter how strong your triceps get, your elbow is stopping
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there hopefully because if you go beyond that it's going to hurt and that has to

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