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Lesson 3 How can you keep your muscles flexible and strong? The Muscular System Proper warm-up and stretching before and cool-down after any physical.

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Presentation on theme: "Lesson 3 How can you keep your muscles flexible and strong? The Muscular System Proper warm-up and stretching before and cool-down after any physical."— Presentation transcript:

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2 Lesson 3 How can you keep your muscles flexible and strong? The Muscular System Proper warm-up and stretching before and cool-down after any physical activity keeps your muscles flexible and strong.

3 Lesson 3 Explain the functions of the muscular system. Describe the different types of muscles in the body. Examine the effects of health behaviors on the muscular system. Identify problems of the muscular system. In this lesson, youll learn to: Lesson Objectives

4 Lesson 3 Functions of the Muscular System Voluntary and Involuntary Muscles When you sleep, muscles help you breathe, make your heart beat, and move food through your digestive system. These involuntary processes happen without your consciously controlling them. When you play the piano or a video game, you are using muscles that are under conscious, or voluntary, control. Without the use of both voluntary and involuntary muscles, you would be unable to perform any of these activities.

5 Lesson 3 Nerve Impulses and Muscle Fibers A muscle is made up of hundreds of long cells called fibers. Muscles work by means of two complementary, or opposing, actions contraction and extension. Muscle contraction is triggered by nerve impulses. Some nerves provide impulses for many muscle fibers. In other areas, a single nerve may provide impulses to only two or three muscle fibers. Structure of the Muscular System

6 Lesson 3 Types of Muscles Smooth Muscles Skeletal Muscles Cardiac Muscles Smooth musclesSmooth muscles can be found in the lining of the blood vessels, the digestive tract, the passageways that lead into the lungs, and the bladder. Smooth muscles are under involuntary control. Structure of the Muscular System

7 Lesson 3 Muscle Contraction and Bone Movement Click image to view movie. Structure of the Muscular System

8 Lesson 3 Regular physical activity is the best way to keep your muscles strong and healthy. Regular physical activity helps keep muscles toned and healthy.muscles toned Practicing good posture strengthens back muscles. Wearing safety equipment and appropriate clothing can protect muscles during physical activity. Care of the Muscular System Structure of the Muscular System

9 Lesson 3 Injury-Related Muscle Problems Bruise Muscle Strain/Sprain Tendonitis Hernia Muscular Dystrophy Problems of the Muscular System

10 Lesson 3 Bruise A bruise is an area of discolored skin that appears after an injury causes the blood vessels beneath the skin to rupture and leak. Swelling can be reduced with an ice pack. Problems of the Muscular System

11 Lesson 3 Muscle Strain or Sprain A strained muscle results when a muscle is stretched or partially torn as a result of overexertion. Strains are usually treated by using the R.I.C.E. (rest, ice, compression, elevation) procedure. A sprain is an injury to the ligament in a joint, and it requires medical treatment. Problems of the Muscular System

12 Lesson 3 Tendonitis Tendonitis can be caused by injury, overuse, or aging. Treatment includes rest, anti-inflammatory medication, or ultrasound. Problems of the Muscular System

13 Lesson 3 Hernia A hernia can result from straining to lift a heavy object.hernia Hernia repair usually requires surgery. Problems of the Muscular System

14 Lesson 3 Muscular Dystrophy Muscular dystrophy is an inherited disorder in which skeletal muscle fibers are progressively destroyed. There is no cure, but with early detection muscle weakness can be delayed through exercise programs. Problems of the Muscular System

15 Lesson 3 Quick Review Provide a short answer to the question given below. Click Next to view the answer. Q. Give examples of how muscles work together with other body systems.

16 Lesson 3 A. Muscles work with respiratory, cardiovascular, and digestive systems. Click Next to attempt another question. Quick Review - Answer

17 Lesson 3 Provide a short answer to the question given below. Click Next to view the answer. Q. Describe cardiac muscle. Quick Review

18 Lesson 3 Click Next to attempt another question. A. Cardiac muscle is a type of striated muscle that forms the wall of the heart. Quick Review - Answer

19 Lesson 3 Provide a short answer to the question given below. Click Next to view the answer. Q. What is tendonitis? Why does it occur? Quick Review

20 Lesson 3 Click Next to attempt another question. A. Tendonitis is the inflammation of a tendon caused by injury, overuse, or aging. Quick Review - Answer

21 Lesson 3 Provide a suitable analysis. Examine the effects of health behaviors on the muscular system. Which muscles are most involved in your favorite physical activities? What behaviors can help you protect the health of these and other muscles? Quick Review

22 Lesson 3 Smooth Muscles Skeletal Muscles Cardiac Muscles Smooth musclesSmooth muscles can be found in the lining of the blood vessels, the digestive tract, the passageways that lead into the lungs, and the bladder. Smooth muscles are under involuntary control. Types of Muscles Smooth muscles act on the lining of passageways and internal organs. Structure of the Muscular System

23 Lesson 3 Smooth Muscles Skeletal Muscles Cardiac Muscles Most of your muscle tissue is made up of skeletal muscle, and almost all skeletal muscles are under voluntary control. skeletal muscle Skeletal muscles often work together, undergoing opposing actions to produce movement. FlexorFlexor and extensor are opposing skeletal muscles.extensor Types of Muscles Skeletal muscles are attached to bone and cause body movements. Structure of the Muscular System

24 Lesson 3 Smooth Muscles Skeletal Muscles Cardiac Muscles Most of your muscle tissue is made up of skeletal muscle, and almost all skeletal muscles are under voluntary control. skeletal muscle Skeletal muscles often work together, undergoing opposing actions to produce movement. FlexorFlexor and extensor are opposing skeletal muscles.extensor Types of Muscles The flexor is the muscle that closes a joint. Structure of the Muscular System

25 Lesson 3 Smooth Muscles Skeletal Muscles Cardiac Muscles Most of your muscle tissue is made up of skeletal muscle, and almost all skeletal muscles are under voluntary control. skeletal muscle Skeletal muscles often work together, undergoing opposing actions to produce movement. FlexorFlexor and extensor are opposing skeletal muscles.extensor Types of Muscles The extensor is the muscle that opens a joint. Structure of the Muscular System

26 Lesson 3 Smooth Muscles Skeletal Muscles Cardiac Muscles The involuntary cardiac muscles are responsible for the contraction of your heart.cardiac muscles The heart contracts rhythmically about 100,000 times each day to pump blood throughout your body. Types of Muscles Cardiac muscle is a type of striated muscle that forms the wall of the heart. Structure of the Muscular System

27 Lesson 3 Regular physical activity is the best way to keep your muscles strong and healthy. Regular physical activity helps keep muscles toned and healthy.muscles toned Practicing good posture strengthens back muscles. Wearing safety equipment and appropriate clothing can protect muscles during physical activity. Care of the Muscular System Muscle tone is the natural tension in the fibers of a muscle. Structure of the Muscular System

28 Lesson 3 TendonitisTendonitis can be caused by injury, overuse, or aging. Treatment includes rest, anti-inflammatory medication, or ultrasound. Tendonitis The inflammation of a tendon is called tendonitis. Problems of the Muscular System

29 Lesson 3 Hernia A hernia can result from straining to lift a heavy object. Hernia repair usually requires surgery. A hernia occurs when an organ or tissue protrudes through an area of weak muscle. Problems of the Muscular System

30 Lesson 3 Types of Muscles Smooth Muscles Skeletal Muscles Cardiac Muscles Most of your muscle tissue is made up of skeletal muscle, and almost all skeletal muscles are under voluntary control. skeletal muscle Skeletal muscles often work together, undergoing opposing actions to produce movement. FlexorFlexor and extensor are opposing skeletal muscles.extensor Structure of the Muscular System

31 Lesson 3 Types of Muscles Smooth Muscles Skeletal Muscles Cardiac Muscles The involuntary cardiac muscles are responsible for the contraction of your heart.cardiac muscles The heart contracts rhythmically about 100,000 times each day to pump blood throughout your body. Structure of the Muscular System


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