6.3 Appendicular Skeleton * 126 bones * primary function = movement * consists of: limb bones...

6.3 Appendicular Skeleton

* 126 bones* primary function = movement* consists of: limb bones (arms/legs)

and their girdles (shoulder/hip)

A. Pectoral Girdle * shoulder * attaches the upper limbs to the trunk

1. clavicles - collarbones

2. scapulae - shoulder blades

B. Upper Limb (Arm)

1. humerus – upper arm

3. ulna – forearm (little finger side)

2. radius – forearm (thumb side)

4. Handa. carpals = wrist (8)

2 rows of 4:* proximal row (thumb little finger) = scaphoid, lunate, triquetrum, pisiform

Dorsal View

Palmar View

* distal row (thumb little finger) = trapezium, trapezoid, capitate, hamate

Dorsal View

Palmar View

Carpal Bones (Right)

Dorsal View

Palmar View

2. metacarpals = palm (5 each hand)3. phalanges = fingers (14 each hand)* each digit (finger) has 3: proximal, middle, distal phalanx

* thumb has only 2: proximal, distal phalanx

distal phalanx

middlel phalanxproximal phalanx

phalanges

metacarpal bones

carpal

bones

ulnaradius

C. Pelvic Girdle* attaches the lower limbs to the trunk