1 / 23

Support System: Bones, Joints and Muscles

Support System: Bones, Joints and Muscles. SEPUP Unit B: Activity 16. What are the functions of bones?. Support Movement Protect internal organs skull protects your brain ribs protect your heart and lungs vertebrae protect your spinal cord Make blood cells

noma
Download Presentation

Support System: Bones, Joints and Muscles

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. What are the functions of bones? • Support • Movement • Protect internal organs • skull protects your brain • ribs protect your heart and lungs • vertebrae protect your spinal cord • Make blood cells • Maintain body’s calcium balance

  3. What are bones made of? • Living bone cells. • Surrounded by minerals. • Hard and extremely strong • Contain channels for blood vessels and nerves • Spongy bone is in the center of bones and contains bone marrow.

  4. What is the function of bone marrow? • Bone marrow in long bones makes: • red blood cells • white blood cells • platelets

  5. What are the different types of bones?

  6. What happens as bones grow? • 300 bones at birth • Cartilage at birth forms into bone. • Some bones fuse together. • Adults have 206 bones. • Most bones grow until age 20.

  7. Importance of Calcium • Calcium is a mineral. • Calcium makes bone hard. • Calcium is needed through out the body.

  8. Importance of Calcium Bones provide calcium to the body if there is not enough in your diet. Eating dairy and calcium-rich foods is important in youth and adults to prevent osteoporosis.

  9. Muscles • Muscle tissue is made of muscle cells. • Muscles contract and relax. • When muscles contract they shorten.

  10. 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.

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

  12. What are the types of muscles? • Skeletal muscles. • Cardiac muscles. • Smooth muscles.

  13. What are the 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.

  14. What are the 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.

  15. What are the 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.

  16. What are 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.

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

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

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

  20. What are joints and ligaments? • Place where two bones meet. • Ligaments connect one bone to another bone. • Ligaments stabilize the joint and allow it to move.

  21. Types of Joints

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

More Related