1. Skeletal, Muscular, and Integumentary Systems
Human Skeleton
Your Bones
Chapter 46
Skeletal, Muscular, and Integumentary Systems

2. Structure of Skeletal Muscle

3. Contraction of a Muscle

4. Three Types of Muscle Tissue

5. Structure of the Human Knee

6. Three Basic Types of Joints

7. Human Skeleton

8. Structure of Bone Tissue

9. Three Types of Skeletal Tissue

10. Types of Joints

11. Cross Section of Skin

12. Three Types of Epithelial Tissue

13. Human Anatomy Terms Superior - toward the head
Inferior - away from the head
Anterior - the front of the body or body part
Posterior - the back of the body or body part
Medial - toward the midline that divides left and right
Lateral - to the side away from the midline
Proximal - closer to the torso
Distal - farther away from the torso
Anatomical position - standing erect, facing the observer, arms are at the sides with palms facing forward.

14. Bone is one of the strongest materials
Bone is one of the strongest materials. Bones are much lighter than steel or concrete, but weight for weight, they are much stronger.

17. Many people develop back problems as they get older
Many people develop back problems as they get older. The discs start to wear away. The vertebra come out of place causing pain. The back gets stiff and makes it difficult to move.
Animals with flexible backbones and skeletons inside their bodies are called vertebrates. Your backbone is a flexible chain of 26 bones.

18. Your rib cage is made up of 12 vertebrae, 24 ribs and a breastbone in three parts.It protects your heart and lungs from knocks and bumps.

19. Over half your bones are found in your hands and feet
Over half your bones are found in your hands and feet. There are 26 bones in each foot and 27 in each hand.

22. Hinge Joint
Ball and Socket Joint

25. Muscular System
Your Muscles

26. Muscles need oxygen and food for energy from your blood in order to work properly. If they work hard but do not get enough, they may go into a spasm and you feel the pain of a cramp.

27. Your strongest muscles are the masseters on each side of your mouth
Your strongest muscles are the masseters on each side of your mouth. They allow you to bite into things with a force of 73kg (160lb).

28. Most of your heart is made of cardiac muscle
Most of your heart is made of cardiac muscle. The cardiac muscle never gets tired and never stops working until you die.