Presentation on theme: "Skeletal System http://www.youtube.com/watch?v=sRI3MxWJ7tY http://www.abcya.com/skeletal_system.htm."— Presentation transcript:
1 Skeletal System http://www.youtube.com/watch?v=sRI3MxWJ7tY
2 Skeletal SystemObjective: By the end of the lesson students will be able to list (3) bones in the body, as well as explain (2) functions of the skeletal system.
3 How many bones are in the human body? Fun QuestionsHow many bones are in the human body?What is the largest bone in your body?
4 Key Point:The skeletal system consists of 206 bones and connective tissue!
5 Have You Ever?? Who is he? What’s his story? Broken a bone?? 1 minute share with the person sitting behind/in front of you!Who is he? What’s his story?
6 5 Main Functions 1. Provides support for the body 2. Protects internal organs from damage.3. Acts as framework for attached muscles.4. Production of red and white blood cells5. Allows movement of limbs
7 2 main parts of skeletal system 1. AxialCenter of skeletonRibs, sternum, skull, and spine2. AppendicularAll the limbs outside the axial skeleton
16 2 Layers of Bone 1. Periosteum – Outer layer Dense, thick, and hard 2. Endosteum – Inner layerLess dense bone that is sponge like.
17 Joints Slightly moveable – vertebra and ribs Defined: Points at which bones meetstatisticsSlightly moveable –vertebra and ribs
18 Types of Joints1. Joint – a location in the body where two or more bones meet to enable movement.2. Ball and Socket JointEnables wide range of motionExample – shoulder and hip3. Hinge JointLesser range of motion than ball and socketExample elbow and knee4. Pivot JointEnables rotation of head and forearm
34 Problems of Skeletal System 4. Osteoporosis – condition in which there is a progressive loss of bone tissueBones weaken and become brittleCaused by a lack of vitamin D and calciumMilk and other dairy products are excellent sources.Weight training and physical activity help increase bone mass