1. Skeletal System

2. Fresh Bones Lab Listen to instructions of the lab. Read procedure with your partner. Complete the dissection portion. Complete the microscope portion. Clean up! Marrow Cavity and marrow Compact Bone

7. Skeletal System STRUCTURE (shape) Bone Skeleton Joint Cartilage Ligament Fluid FUNCTION (job) Living structure with lots of calcium (mineral) creating a mostly solid structure for support and protection. Multiple bones together to provide an organism with support and structure. An area where 2 or more bones come together for protection or movement. Very smooth, flexible, and tough tissue in joints to protect the bones from grinding against each other. Strong tissue that connects bones to bones. Thick and slippery liquid to help joints move smoothly.

8. STRUCTURE (shape) Compact Bone Spongy Bone Marrow Outer Covering (Connective Tissue) Blood Vessels Minerals Parts of Bones FUNCTION (job) Dense part of bone that provides support and protection. _____________________________________________ Provides additional support with out more mass. _____________________________________________ Produces blood cells. ____________________________________________ Provides a place for tendons and ligaments to attach and makes new bone cells. ____________________________________________ Brings nutrients and Oxygen to cells then takes away wastes. _____________________________________________ Mostly calcium provides hardness and strength.

9. Understanding Structure and Function Which bone is a more suited structure for providing protection-the cranium or humerus? Explain your answer.

10. Mystery Skeletondate List at least 5 things about the picture of the skeleton below; then place an O next to the statements that are observations, and an I next to the ones that are inferences. http://nzphoto.tripod.com/animal/tuatara/tuatara_bones.gif

11. SKELETAL SYSTEM (Write under the flap) Function(s) of this system: 1. structure, support, shape 2. protection 3. makes blood cells 4. movement 5. stores minerals

12. Bones and Acids Mini SI Report Question: What happens to a bone when it is soaked in acid for 4 days? Background information: Bones are made of bone cells and minerals. Acids breakdown minerals. Hypothesis: I think the bone will _____________________________________ when it is soaked in acid for 4 days because _____________________. Materials List: Clean chicken bone. vinegar Jar with a cover Graduated cylinder Procedure: 1.Take necessary measurements and make initial observations on bones 2.Place clean chicken bone in jar. 3.Pour enough vinegar in the jar to cover the chicken bone (in milliliters). 4.Cover the jar and let sit for 4 days. Data and Observations: BoneDay 1Day 4 Length7cm Circumference3cm OtherHard & white Conclusion: