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Lecture 6.7: Skeletal System

Lecture 6.7: Skeletal System. Pectoral Girdle. Base for arm movement Clavicle Connects to sternum and scapula Small and fragile Fractures here are common. Figure 6.21. Pectoral Girdle cont…. Scapula Shoulderblades. Figure 6.22. Humerus. Upper Arm. Figure 6.23. Radius and Ulna.

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Lecture 6.7: Skeletal System

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  1. Lecture 6.7: Skeletal System

  2. Pectoral Girdle • Base for arm movement • Clavicle • Connects to sternum and scapula • Small and fragile • Fractures here are common

  3. Figure 6.21

  4. Pectoral Girdle cont… • Scapula • Shoulderblades

  5. Figure 6.22

  6. Humerus • Upper Arm

  7. Figure 6.23

  8. Radius and Ulna • Forearm • Radius—thumbside • Ulna—pinky side • Radius can roll over ulna • Results in pronation • Radius and ulna straight = supination

  9. Figure 6.24

  10. Wrist and Hand • 27 Bones • Carpals—8 bones/hand • Wrist • 2 rows • Limited degree of sliding and twisting • Metacarpals—palm of hand • Phalanges—Fingers • Pollex—Thumb

  11. Figure 6.25

  12. Pelvic Girdle • More massive than the pectoral girdle • More firmly attached

  13. Figure 6.26

  14. Coxal Bone • Hip Bone • Ilium—broad, flared surface • Ischium—forms circle • Pubic symphysis—space between two Ischiums

  15. Figure 6.26b

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