1. Human Body Systems and Health
Chapter 1 Section 2
The Human Skeletal System

3. The Skeletal System—Bones, cartilage, and the connective tissue that holds bones together.

4. Bones are hard…but they are made of living tissue!
Bones help your body maintain homeostasis by storing minerals and making blood cells for when your body needs them.

5. Your Skeleton Has Specific Jobs
Protection — for example, ribs protect your heart and lungs
Storage— bones store minerals and fat
Movement— muscles pull on bones so your body can move
Blood Cells—blood Makes cells are made in the center of some bones

6. Structure of Bone
Cartilage
Blood Vessels

7. Facts About Bone Structure
Bone is a living organ—that’s right, a living organ!
Bone is made of connective tissue and minerals
Special living cells called osteoblasts (AHS tee oh blasts) deposit (put) the minerals in the bone cells

8. More Bone Facts… Compact Bone—very dense
Spongy Bone —has air pockets; very strong
Marrow—center of bone
Red Marrow—makes red and white blood cells
Yellow Marrow—stores fat for energy

9. Which Kind of Bone Tissue is Hard and Compact?
Compact Bone
Spongy Bone
Marrow
Marrow

10. No! The Answer is Compact Bone!
Continue
No! The Answer is Compact Bone!

11. Correct!

12. What Type of Bone Makes Blood Cells and Stores Fat?
Compact Bone
Spongy Bone
Marrow
Marrow

13. Continue
No! The Answer is Marrow!

14. Correct!

15. How Do Bones Grow? Bones start out soft, as cartilage
As babies grow bigger their cartilage turns into bone
Our ears and our nose are examples of cartilage tissue
They are both flexible

16. Three Main Kinds of Moving Joints
Gliding
Ball and Socket
Hinge
Three Main Kinds of Moving Joints

17. Some Joints Don’t Move Fortunately!

18. Human Joint Animations

19. Skeletal Injuries Fracture—a break in a bone
Dislocation—a bone forced out of location or place
Sprain—abnormal stretching or tearing of a ligament (remember, ligaments hold muscles onto bones)

20. Skeletal Injuries and Diseases
Fracture
Skeletal Injuries and Diseases
Fracture—a break in a bone
Dislocation—a bone forced out of location or place
Sprain—abnormal stretching or tearing of a ligament (remember, ligaments hold muscles onto bones)

21. Skeletal Injuries and Diseases
Fracture
Skeletal Injuries and Diseases
Fracture—a break in a bone
Dislocation—a bone forced out of location or place
Sprain—abnormal stretching or tearing of a ligament (remember, ligaments hold muscles onto bones)

22. Skeletal Injuries and Diseases
Sprain
Fracture
Skeletal Injuries and Diseases
Fracture—a break in a bone
Dislocation—a bone forced out of location or place
Sprain—abnormal stretching or tearing of a ligament (remember, ligaments hold muscles onto bones)

23. Skeletal Diseases
Osteoporosis—bones become less dense and more weak causing bones to break easily
Arthritis—swelling and stiffening of joints causing pain and reduced flexibility

24. Skeletal Diseases
Osteoporosis—bones become less dense and more weak causing bones to break easily
Arthritis—swelling and stiffening of joints causing pain and reduced flexibility

25. Skeletal Diseases
Osteoporosis—bones become less dense and more weak causing bones to break easily
Arthritis—swelling and stiffening of joints causing pain and reduced flexibility

26. One Of Our Favorite Skeletons

27. Section Review Questions
Which of the following is NOT an organ of the skeletal system?
Bone
Cartilage
Muscle
None of the above

28. Section Review Questions
What are the four functions of bones?

29. Section Review Questions
What are the three kinds of moveable joints?

30. Section Review Questions
Describe two diseases that affect the skeletal system

31. The End