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