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Skeletal System

Learn about the skeletal system, including 206 bones, their functions like providing framework and producing RBCs, bone classifications such as long, short, flat, and irregular, and the axial and appendicular skeleton. Identify ligaments, tendons, and anatomical directions.

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Skeletal System

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  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) • 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

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