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The Vital Components of Bone Structure

Explore the living tissue components of bones, including minerals, elastin, and collagen. Understand how bones change with age and the effects of calcium deficiency on bone hardness.

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The Vital Components of Bone Structure

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  1. Firm But Flexible Components of Bone Powerpoint Adapted from materials provided by The University of Texas Health Science Center at San Antonio http://teachhealthk-12.uthscsa.edu/curriculum/bones/bone03c-chickenbone.asp

  2. Objectives • By the end of this lab you should be able to: • Determine structure and function of skeleton and bones • Analyze the gross anatomy of bone and bone tissue

  3. What is Bone? • Bone is a LIVING TISSUE made up of three main components

  4. What is Bone? • Bone is made of • 45% Minerals • Mainly Calcium & Phosphorus • 30% Living Tissue • Elastin & Collagen • 25% Water

  5. Minerals • The main minerals found in bone are CALCIUM and PHOSPHORUS • There function is to provide RIGIDITY to the bones, or (make them HARD)

  6. Living Tissues • The living tissues in the bone include • BLOOD VESSELS: which carry new blood cells, nutrients and wastes through the bones • Elastin: stretchy component of BONE and CARTILIDGE which allows the bone to BEND without breaking • COLLAGEN: new bone GROWTH, hardens with minerals

  7. How Bones Change . . . • In young animals, bones are made of more PROTEIN • As the animal ages, the collagen PROTEIN is hardened with MINERALS like calcium

  8. What would happen . . . • If an animal had a calcium deficiency when they were young?

  9. What would happen . . . • If an animal had a calcium deficiency when they were young? • Their bones wouldn’t have enough calcium to harden (or maintain hardness) as they age

  10. Lab Materials • Chicken Leg Bones • Vinegar • Bleach • Scale • Ruler • Lab Worksheet

  11. Test #1: Identifying Living Tissue • We will be using a substance (VINEGAR) that will breakdown the MINERAL portions of the bone • This process will result in only the LIVING TISSUES remaining • The bone will become ________________?

  12. Test #2: Identifying Bone Minerals • We will be using a substance (BLEACH) that will breakdown the SOFT TISSUE portions of the bone • This process will result in only the MINERALS remaining • The bone will become ________________?

  13. Procedure • Step 1: Take two chicken bones • Step 2: Remove all fat and remaining meat • Step 3: Weigh and measure each bone, record your findings on the lab worksheet • Step 4: Label one jar VINEGAR and one jar BLEACH • Step 5: Put one bone in each jar • Step 6: Pour enough liquid in each respective jar to cover the bones

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