The skeletal and muscular systems
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The Skeletal and Muscular Systems PowerPoint PPT Presentation

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What do you know about bones and muscles?. The Skeletal and Muscular Systems. Now we’re movin …. Working together to move you…. Skeletal System. Muscular System. The Skeletal System has several important functions. - Provide support to the body - Protect internal organs

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The Skeletal and Muscular Systems

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What do you know about bones and muscles?

The Skeletal and Muscular Systems

Now we’re movin…

Working together to move you…

Skeletal System

Muscular System

The Skeletal System has severalimportant functions

- Provide support to the body

- Protect internal organs

- Work with the muscular system to move thebody

- Produce red blood cells

- Store calcium, fat, and other minerals

Our bones are not hollow!

Each layer of bone has its own function

  • 4 Layers:

    • Periosteum- Outermost covering

    • Compact Bone- dense tissue

    • Spongy Bone-

    • Softer part of bone

    • Bone Marrow- where blood cells are made

Bone Marrow

Spongy Bone


Compact Bone

Joints: where 2 or more bones meet

Bones must have several other types of tissues present to have a healthy joint (ligaments, tendons, cartilage)

Ligaments connect bones to other bones to provide support

Important Skeletal Tissues

Tendons connect muscles to bones

*a common one is the Achilles tendon

Cartilage is found between two bones and serves as a cushion or shock absorber

Muscular System

Its main function is to assist the skeletal system in moving the body




3 Types of Muscles

Voluntary muscles we can control, and involuntary muscles contract and relax with out our control.

  • Skeletal Muscles:

    These must stretch and contract a lot and they are mostly all attached to the skeleton. These we can move consciously. They are VOLUNTARY.

  • Cardiac Muscles:

    These are the muscles found in the heart. They are INVOLUNTARY.

  • Smooth Muscles:

    These muscles are the ones that are found in our internal organs. They help in digestion and other processes that we do not have to consciously think about. They are INVOLUNTARY.

Can you have 1 of these systems without the other??

  • NO!!!!!

    • Bones without muscles...stiff, unmoving skeleton!

    • Muscles without bones…a blob of muscles on the ground with no structure!

Fun Facts about your bones!

  • Most infants are born with about 270 bones but adults have 206 bones…wait, what??

  • Of those 206 bones, 103 are found in the hands and feet!!

  • Humans and giraffes have the same number of bones in their necks…crazy!

  • The Femur is the longest bone in the human body

  • Regular exercise actually makes your cardiac muscle stronger! That’s why it’s called cardio…

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