Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Bones, Muscles, and Skin - The Muscular System Bellringer: Are bones dead or alive? Explain your answer. Bones, Muscles, and Skin - The Muscular System Types of Muscle Q. How does skeletal muscle help my body move? A. Q. Where is smooth muscle found? A. Bones, Muscles, and Skin - The Muscular System 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. Bones, Muscles, and Skin - The Muscular System Types of Muscle Muscles Location in Body Voluntary or Involuntary Striated or Not Skeletal Attached to bones of skeleton Voluntary Striated Smooth Inside many internal organs Only in heart Involuntary Not striated Involuntary Striated Cardiac Bones, Muscles, and Skin - The Muscular System 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… Bones, Muscles, and Skin - The Muscular System 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. 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… 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. 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. Bones, Muscles, and Skin - The Muscular System Skeletal Muscles Click the Video button to watch a movie about skeletal muscles. Bones, Muscles, and Skin - The Muscular System More on Muscle Types Click the PHSchool.com button for an activity about muscle types. Bones, Muscles, and Skin Graphic Organizer Muscles can be Smooth muscles Involuntary muscles Voluntary muscles include include Cardiac muscles Skeletal muscles