1. Bones & Muscles

3. 1. How many bones does the human skeleton contain?

4. 206

5. 2. The 5 Functions of the skeletal system
Gives shape & support
Protects internal organs
Moves muscles
Forms blood cells
Stores calcium and phosphorous

6. 3. Bone Cross Section
Periosteum: soft, thin, covers and protects the bone
Compact Bone: Hard, outer surface. Can heal itself when broken
Spongy Bone: Porous, contains blood vessels, nerves
Bone marrow: manufactures red blood cells

7. 4. Skeletal System
is divided into
two parts

8. a. Axial (central) Skull (protects the brain).
Ribs ( protect lungs, and heart).
Spinal column (houses and protects the spinal cord).

9. b. Appendicular (limbs)
Legs
Pelvis
Arms
Shoulders

10.
Skeletal Rap

13. Types of Joints
5. Joints: Immovable
Skull
Pelvis

14. Immoveable joints are located in the skull and pelvis.

15. Types of Joints
6. Joints: Movable
The 4 types we looked at yesterday!

17. Types of Joints a.Ball and Socket Joint
Bone with a rounded end that fits into a cuplike cavity on another bone

18. Ball & Socket examples: 1. Shoulders and Hips
2. Function: Allows arms and hips to move in any direction
Can move in a full 360 degrees

19. Types of Joints b. Pivot Joint
One bone rotates in a ring of another bone that does not move

20. Pivot Joint examples: 1. First two neck vertebrae & joint beneath elbow
2. Function: Moves in a semicircle motion by twisting against each other

21. Types of Joints c. Hinge Joint
Back-and-forth movement like hinges on a door

22. Hinge examples: 1. Elbows & Knees
2. Function: Move like hinges on a door, can only swing back and forth

23. Type of Joints d. Gliding Joint
One part of a bone slides over another bone

24. Gliding Joint examples: 1. Spine, Wrists, Ankles
2. Function: Slide against each other in a gliding motion, gives lots of freedom

25. http://studyjams. scholastic. com/studyjams/jams/science/index. htm
Skeletal Study Jam

28. Skeletal muscle is the type of muscle that primarily responsible for movement.

31. Cardiac muscle is found only in the heart and it’s adapted function is to generate and conduct electrical impulses necessary for its rhythmic contraction (it keeps the heart beating)

34. The most common function of smooth muscle is to squeeze, exerting pressure on the space inside the tube or organ it surrounds in order to move material through it.

36. How do muscles work

38. Inside a Muscle
Muscle Fiber
Muscle
Myofibril