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Bellringer: Are bones dead or alive? Explain your answer.

- The Muscular System. Bellringer: Are bones dead or alive? Explain your answer. - The Muscular System. Types of Muscle. - The Muscular System.

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Bellringer: Are bones dead or alive? Explain your answer.

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  1. - The Muscular System Bellringer:Are bones dead or alive? Explain your answer.

  2. - The Muscular System Types of Muscle

  3. - The Muscular System Types of MuscleInvoluntary muscles are not under your conscious control. Involuntary muscles are responsible for such essential activities as breathing and digesting food.Voluntary muscles are under your conscious control. Smiling, turning a page in a book, and getting out of your chair when the bell rings are all actions controlled by voluntary muscles.

  4. - The Muscular System Types of Muscle

  5. - The Muscular System Skeletal MusclesA tendon is a strong connective tissue that attaches muscle to bone.Skeletal muscles react very quickly and tire quickly. Consider the swimmer…

  6. - The Muscular System Smooth MusclesSmooth muscles are found inside of many internal organs, such as the stomach and blood vessels.Smooth muscles are not striated. Behaving differently than skeletal muscles, smooth muscles react more slowly and tire more slowly.

  7. - The Muscular System Cardiac MusclesSimilar to smooth muscle in that it is involuntary.Similar to skeletal muscle in that it is striated.Cardiac muscle does not get tired. Consider those repeated contractions we call heartbeats…

  8. - The Muscular System Muscles at Work • Muscles do their work by contracting, becoming shorter and thicker. Muscle cells contract when they receive messages from the nervous system. • Because muscle cells can only contract, not extend, skeletal muscles must work in pairs. While one muscle contracts, the other muscle in the pair relaxes to its original length.

  9. - The Muscular System Muscles at Work • When exercising to build muscular strength, why is it important to exercise both muscles in a muscle pair equally? • Because paired muscles must work together, and exercise makes individual muscle cells grow in size, exercising both muscles in a pair will make them grow equally strong.

  10. - The Muscular System Skeletal Muscles • Click the Video button to watch a movieabout skeletal muscles.

  11. - The Muscular System More on Muscle Types • Click the PHSchool.com button for an activityabout muscle types.

  12. Graphic Organizer Muscles can be Involuntary muscles Voluntary muscles include include Smooth muscles Cardiac muscles Skeletal muscles

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