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Skeletal System

Skeletal System. Chapter 7. Bellringer. What is the purpose of a house frame? Set up a venn diagram to compare a house frame to the human skeletal system?. Functions of the Skeletal System. Bones shape, support, and protect body structures Aid body movements

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Skeletal System

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  1. Skeletal System Chapter 7

  2. Bellringer • What is the purpose of a house frame? • Set up a venn diagram to compare a house frame to the human skeletal system?

  3. Functions of the Skeletal System • Bones shape, support, and protect body structures • Aid body movements • House tissues that produce blood cells • Serves as points of muscle attachment • Storehouse of minerals

  4. Bellringer • What do you know about the structure of bones? • Recall from biology that birds have hollow bones. What are the advantages of having hollow bones? • Which do you think would be stronger, hollow bones or solid bones?

  5. Activity • Roll up 3 pieces of paper so they are about 1 inch wide. • Stand them on end and place a paper plate on top of them. • Add weight until they collapse. How much weight did they hold? • Repeat, rolling the paper up as tightly as possible, so there is no hollow middle. How much weight could they support?

  6. Bone Structure • Bones differ greatly in size and shape, but are similar in structure. • Broader area at the ends is called the “epiphysis”. • Epiphysis is covered with hyaline cartilage (???) called “articular*** cartilage”. • The shaft of the bone is called the “diaphysis”.

  7. Bone Structure, continued…. • “periosteum” = ??? • Periosteum is a vascular (???) covering of fibrous tissue that completely covers the bone, except for the articular cartilage on the ends. • Tendons and ligaments attach to the periosteum. • Helps form and repair bone tissue.

  8. Bone Structure, continued…. • Compact bone (cortical bone) • Tightly packed • Continuous matrix with no gaps • Makes up the walls of the diaphysis • Spongy bone (cancellous bone) • Consists of branching bony plates with connecting spaces, which reduce weight • Makes up the epiphyses (plural form), with thin layers of compact bone on their surfaces

  9. Some bones have more dense spongy bone than others. WHY?

  10. Bone Structure, continued…. • “Medullary cavity” – hollow chamber in the diaphysis that is continuous with (???) the spongy bone (located where?) • “endosteum” = ? • Endosteum is a thin layer of cells lining the medullary cavity. • “Marrow” – specialized type of soft _______ tissue that fills the cavity.

  11. Label Diagram Handout

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