1. Skeletal System
Bones Lecture

2. Task Read Page 8 (10 min) Identify and note the following things:
Number of bones in the skeletal system
What the skeleton/bones provides for the human body
How levers are created and what they allow

3. Functions of Skeletal System
206 bones in adult skeleton
Provides framework for body
Gives body shape
Permits one to stand upright
Protects vital organs
Flexible joints act as levers for coordinated movement
Bones
firm anchor for skeletal muscles
produce RBCs in marrow cavities

4. What’s the difference?
LIGAMENTS: bone to bone
TENDONS: Muscle to bone

5. Classifications of Bones p. 8
Long: humerus and femur (arms, legs, toes, fingers)
Large
Spongy tissue
Slightly curved
Short: wrist group, kneecap,
Flat: cranium (skull), ribs and sternum
Irregular: vertebrae, facial bones

6. Axial Skeleton p. 11 Skull (cranium) Vertebral Column (spine) Sternum
Cervical, thoracic, lumbar, sacrum and coccyx
Sternum
Ribs

7. Appendicular Skeleton
Upper Extremities
Clavicle: (collar bone), SC joint
Scapula (shoulder blade), AC joint
Humerus (upper arm)
Radius vs. Ulna (forearm)
Carpals (wrist)
Metacarpals (hand)
Phalanges (fingers)

8. Appendicular Skeleton
Lower Extremities
Hip: Ilium, ishium and pubis
Femur
Patella (knee cap)
Tibia vs. Fibula
Tarsals (included is the Calcaneus or heel)
Metatarsals
Phalanges (toes)

9. Anatomical Directions