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Support System: Bones, Joints and Muscles

Support System: Bones, Joints and Muscles. SEPUP Unit B: Activity 16. What are bones made of?. Function of bone marrow?. What are the different types of bones?. Bone growth?. Importance of Calcium. Muscles. Made of muscle cells . Contract and relax.

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Support System: Bones, Joints and Muscles

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  1. Support System: Bones, Joints and Muscles SEPUP Unit B: Activity 16

  2. What are bones made of?

  3. Function of bone marrow?

  4. What are the different types of bones?

  5. Bone growth?

  6. Importance of Calcium

  7. Muscles • Made of muscle cells. • Contract and relax. • Contraction causes muscles to shorten. • Work in pairs.

  8. Do this…. • Hold your arm out straight. • Feel what the muscles are doing when you bend it toward your face. • Feel the biceps and the triceps muscles.

  9. Tendons • Silvery, shiny tissue. • Attach muscle to the bone. • Tendons attach muscles to bones so that bones can move.

  10. Types of muscles? • Skeletal muscles. • Cardiac muscles. • Smooth muscles.

  11. Characteristics of Skeletal Muscle? • Attach to bones for movement and to protect inner organs. • Bundles of muscle fibers are surrounded by a connective sheath. • Muscle cells are striated (striped) depending on how much actin and myosin they contain. • Movement of skeletal muscles is voluntary.

  12. Characteristics of Cardiac Muscle? • Found only in the heart. • Can beat or pulse on their own. • When cardiac muscle cells touch each other they beat together. • Has characteristics of Smooth and Skeletal muscle. • Are involuntary (like smooth muscle). • Striated like skeletal muscle.

  13. Characteristics of Smooth Muscle? • Found in the walls of hollow organs like the digestive tract and walls of blood vessels. • Cells are thin and long. • They form sheets rather than bundles. • Control slow, involuntary movement.

  14. Examples of Smooth Muscle Movements? • Contraction of the walls of the stomach and intestines. • Contraction of arteries to regulate the blood pressure and the flow of blood.

  15. Voluntary and Involuntary Movements? • Voluntary – Actions that are under your control. • Involuntary – Actions that are not under your control.

  16. Voluntary: Actions that are under your control. • Skeletal muscles – walking, talking, bending.

  17. Involuntary: Actions that are not under your control. • Smooth and Cardiac muscles – breathing, digesting, heart beating. http://vimeo.com/8321006

  18. Joints and Ligaments • Joint - Place where two bones meet. • Ligaments connect one bone to another bone. • Ligaments stabilize the joint and allow it to move.

  19. Types of Joints

  20. How do muscles, joints and bones work? • The skeletal/muscle system works like a lever.

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