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Dive into the purpose and structure of the muscular system with this detailed lesson on skeletal, cardiac, and smooth muscle cells. Discover voluntary and involuntary muscle functions and activities to enhance learning.

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Please Do Now...

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  1. PleaseDo Now... Complete the K and W of the KWL chart. (p. 1) Activating Strategy: LEQ: What is the purpose of the muscular system?

  2. Muscular System • What is the purpose of the muscular system? Lesson Essential Question (LEQ)

  3. Muscular System Preview Vocabulary: Voluntary Muscle Involuntary Muscle LEQ: What is the purpose of the muscular system?

  4. Muscular System • This system is made up of all the muscles in your body. LEQ: What is the purpose of the muscular system?

  5. Muscular System • There are three types of muscle cells or fibers in the human body. Turn and tell your neighbor at least one type. Skeletal Cardiac Smooth Structure: LEQ: What is the purpose of the muscular system?

  6. Muscular System • Striated (horizontal stripes when viewed under a microscope) • Long and cylindrical in shape • Multiple nuclei • Microscopic -- lie deep inside a muscle (many cells or fibers come together to form what we see as a skeletal muscle) • Examples in the body: Biceps, Triceps, Gluteus Maximus, Rectus Abdominis, Pectoralis Major… Skeletal Muscle Cells Structural Characteristics LEQ: What is the purpose of the muscular system?

  7. Muscular System Skeletal Muscle Cells Structure LEQ: What is the purpose of the muscular system?

  8. Muscular System Quick Check for Learning Give two get two characteristics of a skeletal muscle fiber. Skeletal Muscle Cells Structure

  9. Muscular System • Striated • Cylindrical -- branch out to form a “Y” • Multiple nuclei • Cells are banded together Why are they banded together? (Think pair/share) • Examples in the body: The Heart Cardiac Muscle Cells Structural Characteristics LEQ: What is the purpose of the muscular system?

  10. Muscular System Cardiac Muscle Cells Structure LEQ: What is the purpose of the muscular system?

  11. Muscular System Quick Check for Learning Give two get two characteristics of a cardiac muscle fiber. Cardiac Muscle Cells Structure

  12. Muscular System • Smooth -- not striated • Cells are long, thin, and pointed at the end • Smaller than skeletal muscle fibers • One nucleus • Examples in the body: found in the digestive track (esophagus, stomach, small intestine, large intestine), bladder, uterus and in the walls of blood vessels Smooth Muscle Cells Structure: LEQ: What is the purpose of the muscular system?

  13. Muscular System Smooth Muscle Cells Structure: LEQ: What is the purpose of the muscular system?

  14. Muscular System Quick Check for Learning Give two get two characteristics of a smooth muscle fiber. Smooth Muscle Cells Structure

  15. LEQ: What is the purpose of the muscular system?

  16. Skeletal Muscle Cardiac Muscle Smooth Muscle

  17. Muscular System Student Activity #2: Voluntary or Involuntary??? That is the Question! • Students should turn to page 3 in their packets. Shared reading: Simon Says… a Lot About Muscles! • Students will work with their seat partner to complete this activity and discover the involuntary action that may be contagious! LEQ: What is the purpose of the muscular system?

  18. Muscular System When referring to muscles and how they function, muscles can function two different ways: Voluntary muscles- muscles that a person can control. Involuntary muscles- muscles that function without a person’s control. LEQ: What is the purpose of the muscular system?

  19. Muscular System Summarizing Strategy: 3-2-1 Compare the cells: • Provide 3 ways that smooth muscle cells are different from skeletal muscle cells. • Provide 2 ways that skeletal muscle cells are different from cardiac muscle cells. • Provide 1 example of voluntary and involuntary muscle function. LEQ: What is the purpose of the muscular system?

  20. Please Do Now... Activating Strategy: Write the names of the three muscle cells found in the human body in the first column of your graphic organizer on p. 5 of your packet. • LEQ: What is the purpose of the muscular system?

  21. Muscular System Lesson Essential Question (LEQ) What is the purpose of the muscular system?

  22. Muscular System Complete Graphic Organizer (p. 5) Student Activity: Muscle Function and Purpose • LEQ: What is the purpose of the muscular system?

  23. Muscular System Skeletal Muscle Function • Function #1: Helps us move • Skeletal muscles attach to bones and pull on bones to cause movement. • How do most skeletal muscles work? Voluntary or Involuntary? • Metaphors: • Pulling something with a rope (church bell, bucket in a well, yo-yo) • Using a lever to move something • A ski gondola / stage curtain • String puppets • Drawbridge • Tug of War LEQ: What is the purpose of the muscular system.

  24. Muscular System Skeletal Muscle Function • Function #2: Holds the skeleton together, and helps support body weight to maintain balance and posture. • Muscles located on the opposite sides of the body pull simultaneously with the same amount of force, to keep you balanced or hold your posture.They also support your body weight. • Metaphors: • Support posts when building a roof • A tent or tee-pee • Stake up a tree • Bridge • Legs of the chair • Splint • Tug of war/teeter totter LEQ: What is purpose of the muscular system?

  25. Muscular System Function #3: Pumps blood • It’s rhythmic, powerful contractions pushblood out of the heart as it beats. • Intercalated disks allow waves to sweep across the cells thus synchronizing muscle contraction. • How does our heart work? (voluntary or involuntary) • Metaphors: • Metronome • Perfume bottle/water gun • Water pump Cardiac Muscle Function What is the purpose of the muscular system.

  26. Muscular System Quick Check for Learning Analysis Instructions - Answer the following questions: • How does a string puppet work like a skeletal muscle? • How does a tent function like a skeletal muscle? • How does a perfume bottle function like your heart?

  27. Muscular System Function #4: Moves substances through the body (food, waste, blood). • In the digestive track, smooth muscle pushesfood through the digestive system. • In the walls of blood vessels, they squeezeblood flowing through vessels to help maintain blood pressure. • How do they work? (voluntary or involuntary) Metaphors: • Toothpaste • Go-gurt tube • Water pipes / water slides • Telephone lines • Air pump Smooth Muscle Function: LEQ: What is the purpose of the muscular system?

  28. Muscular System Function #5: Produces body heat • Heat is generated when the muscles use fuel to do their job (nearly 85% of body heat is the result of muscle contraction). Metaphors: • Train (steam or coal engine) • Car motor (burns fuel) • Campfire All Muscle Types LEQ: What is the purpose of the muscular system?

  29. Muscular System Quick Check for Learning Analysis Instructions: Answer the following questions: • How is pushing toothpaste through a toothpaste tube similar to the function of smooth muscles? • How does a steam engine function like our muscles? LEQ: What is the purpose of the muscular system?

  30. Muscular System Summarizer: Ticket Out The Door Part #1 • What is the purpose of the muscular system?(List the 5 functions) Function: • Helps us move • Holds us together and helps us balance and hold our posture. • Moves substances through the body (food, waste, and blood). • Pumps blood • Produces heat. LEQ: What is the purpose of the muscular system?

  31. Muscular System Summarizer:Ticket Out The Door (continued) Part #2: Analysis • Respond to one of the three prompts. Function:

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