The Appendicular SkeletonSalt Lake City Community CollegeHuman Anatomy Laboratory

THE SKELETAL SYSTEMThe Appendicular Skeleton

2 pairs of limbs and 2 girdles Pectoral (shoulder) girdle attaches upper limbs Pelvic (hip) girdle secures lower limbs 3-Segmented limbs

Upper = arm Arm Forearm Hand

Lower = leg Thigh Leg Foot

Pectoral Girdle(Shoulder Girdle)

Clavicle – anterior: collar bone Scapula – posterior: shoulder blade

Scapula

Glenoid cavity articulates with the humerus

Acromium articulates with clavicle

Coracoid process projects anteriorly

Upper extremity

Arm or Brachium = upper arm Between shoulder

and elbow (humerus) Forearm or

Antebrachium Radius & ulna

Hand includes: Wrist (carpus) Palm (metacarpus) Fingers (phalanges)

Arm Humerus is the only

bone Head of humerus fits

into glenoid cavity of scapula

Distal & medially, trochlea articulates with the ulna

Distal & laterally capitulum articulates with the radius

Medial & lateral epicondyles

Right humerus, anterior view

Right forearm bones, anterior view

Hip bone (os coxae): 3 separate bones in childhood which fuse

Ilium

Ischium

Pubis

Lower limb

Thigh: femur

Leg (lower leg)TibiaFibula

Foot

Right femur, anterior view

Right lower leg, anterior view

Right foot, superior (dorsal) view and inferior (plantar) view