1. Chapter 16 Your Body Systems Lesson 1 Your Skeletal System Next >> Click for: >> Main Menu >> Chapter 16 Assessment Teacher’s notes are available in the notes section of this presentation.

2. A body system made up of bones, joints, and connective tissue  skeletal system Soft tissue in the center of some bones  marrow The point at which two bones meet  joint

3. Strong flexible, gel-like tissue that cushions your joints  cartilage Tough bands of tissue that attach your muscles to bones  tendons Cord-like tissues that connect the bones in each joint  ligaments

4. In this lesson, you will learn to  explain the functions of the skeletal system.  identify four types of joints.  list some problems of the skeletal system.  practice healthful behaviors to keep your skeletal system healthy.

5. Analyzing a Graphic Using Figure 16.1 on page 405, find examples of each kind of joint discussed in the lesson.

6. Your Body’s Framework The skeletal system helps you stand up and works with your muscles to help you walk, run, jump, bend, lift, and carry. skeletal system A body system made up of bones, joints, and connective tissue

7. The skeletal system includes many bones that support the body and protect the organs.

8. The backbone, or spinal column, consists of 33 separate bones called vertebrae.

9. Functions of Your Skeletal System Skeletal System Functions The skeletal system provides a strong, stable framework capable of movement. The skeletal system supports and protects delicate internal organs. Bones store important minerals such as calcium and phosphorus. Bones produce the body’s blood cells.

10. Functions of Your Skeletal System Red bone marrow makes millions of blood cells each day. marrow Soft tissue in the center of some bones

11. Joints Some joints do not move. Others move only slightly, and others allow a wide range of movement. joint The point at which two bones meet

12. Joints Types of Mobile Joints Hinge JointsGliding Joints Pivot Joints Ball-and-Socket Joints

13. Connective Tissue At joints where movement occurs, the bone surfaces are coated with smooth, slippery cartilage. cartilage A strong flexible, gel-like tissue that cushions your joints

14. Connective Tissue Tendons are another type of connective tissue. tendons Tough bands of tissue that attach your muscles to bones A large tendon that you can easily feel is your Achilles tendon.

15. Connective Tissue Ligaments help hold bones in place. ligaments Cord-like tissues that connect the bones in each joint

16. Problems of the Skeletal System Skeletal ProblemDescription Fracture A break in the bone caused by an injury Dislocation When a bone is pushed out of its joint Sprain Stretching or twisting of ligaments in a joint Overuse Injury An injury that happens over time, especially in sports Scoliosis A disorder in which the spine curves to one side of the body Osteoporosis A condition characterized by brittle and porous bones

17. Caring for Your Skeletal System Good Nutrition Low-fat and fat-free dairy products contain calcium and other nutrients that are important to good health.

18. Caring for Your Skeletal System Regular Physical Exercise Regular exercise increases bone mass.

19. Caring for Your Skeletal System Posture Good posture keeps your spine healthy.

20. Caring for Your Skeletal System Protecting Yourself Use protective gear when playing sports, riding your bike, or in-line skating.

21. What I Learned Vocabulary What are joints? Name four types. Lesson 1 Review

22. What I Learned List Name three functions of the skeletal system. Lesson 1 Review

23. What I Learned Identify What are two problems of the skeletal system? Lesson 1 Review

24. Thinking Critically Apply You and another teen on the gymnastics team are practicing. You see your teammate doing an exercise that the coach said not to do. What risk is your teammate taking? Lesson 1 Review

25. Thinking Critically Synthesize Jan understands the importance of eating foods rich in calcium. She is allergic to milk, however. What suggestions can you make that might help Jan? Lesson 1 Review

26. Click for: End of Chapter 16 Your Body Systems Lesson 1 Your Skeletal System >> Main Menu >> Chapter 16 Assessment