Lecture 6.7: Skeletal System
Base for arm movement Clavicle Connects to sternum and scapula Small and fragile Fractures here are common
Pectoral Girdle
Figure 6.21
Scapula Shoulderblades
Pectoral Girdle cont…
Figure 6.22
Upper Arm
Humerus
Figure 6.23
Forearm Radius—thumbside Ulna—pinky side Radius can roll over ulna Results in pronation Radius and ulna straight = supination
Radius and Ulna
Figure 6.24
27 Bones Carpals—8 bones/hand Wrist 2 rows Limited degree of sliding and twisting Metacarpals—palm of hand Phalanges—Fingers Pollex—Thumb
Wrist and Hand
Figure 6.25
More massive than the pectoral girdle More firmly attached
Pelvic Girdle
Figure 6.26
Hip Bone Ilium—broad, flared surface Ischium—forms circle Pubic symphysis—space between two
Ischiums
Coxal Bone
Figure 6.26b