Skeletal System Bones Lecture

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

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

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

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

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

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)

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)

Anatomical Directions