1. Bones, Muscles, and Skin Bellringer: Are bones dead or alive? Explain your answer. - The Muscular System

2. Bones, Muscles, and Skin Types of Muscle - The Muscular System Q. How does skeletal muscle help my body move? A. Q. Where is smooth muscle found? A.

3. Bones, Muscles, and Skin Types of Muscle Involuntary 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. - The Muscular System

4. Bones, Muscles, and Skin Types of Muscle - The Muscular System MusclesLocation in Body Voluntary or Involuntary Striated or Not SkeletalAttached to bones of skeleton VoluntaryStriated SmoothInside many internal organs InvoluntaryNot striated CardiacOnly in heartInvoluntaryStriated

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

6. Bones, Muscles, and Skin Smooth Muscles Smooth 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. - The Muscular System

7. Bones, Muscles, and Skin - The Muscular System Cardiac Muscles Similar 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. Bones, Muscles, and Skin - 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. Bones, Muscles, and Skin - 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. Bones, Muscles, and Skin Skeletal Muscles Click the Video button to watch a movie about skeletal muscles. - The Muscular System

11. Bones, Muscles, and Skin More on Muscle Types Click the PHSchool.com button for an activity about muscle types. - The Muscular System

12. Bones, Muscles, and Skin Graphic Organizer Muscles Voluntary muscles can be include Involuntary muscles include Smooth muscles Cardiac muscles Skeletal muscles