1. Skeletal System

2. The framework of your body and it is made of 206 living bones (300 in babies)

3. 5 Functions of the skeletal system 1. Gives shape and support to your body

4. 2. Protects your internal organs =

5. 3. Muscles attached to your bones help you move

6. 4. Marrow in the center of bones makes blood cells (2.5 million/second)

7. 5.Bones store calcium and phosphorus for our body - Ca helps our heart and muscles work -P helps our cells produce and store energy -When stored in our bones, Ca and P help make bones stronger

8. Joints Any place where 2 or more bones come together. Ligaments hold the bones together

9. 5 types of joints 1.Immovable joint (little or no movement)-skull

10. 2.Ball and Socket (circular motion)-hip and shoulder

11. 3. Pivot (twisting motion)-forearm

12. 4. Hinge (one direction)- elbow and knee

13. 5. Gliding (bones slide past each other)- wrist

16. Muscular System

17. Over 600 muscles make movement possible

18. 2 Functions of the Muscular System 1. Helps your body move

19. 2. Produces heat for your body (through exercise or shivering)

20. 2 Types of Muscles 1. Voluntary muscles- muscles you control

21. 2. Involuntary muscles- muscles you cannot consciously control

22. 3 types of muscle cells

23. 1. Skeletal- moves your bones, voluntary

24. 2. Cardiac- only found in heart, involuntary

25. 3. Smooth- Found in intestines and other internal organs, involuntary Animation of your esophagus squeezing food towards your stomach

26. Muscles work in pairs to help you move One contracts (tightens) and the other relaxes