The Appendicular Skeleton Salt Lake City Community College

The Appendicular Skeleton Salt Lake City Community College Human Anatomy Laboratory

THE SKELETAL SYSTEM The Appendicular Skeleton n n 2 pairs of limbs and 2 girdles Pectoral (shoulder) girdle attaches upper limbs Pelvic (hip) girdle secures lower limbs 3 -Segmented limbs ¨ Upper = arm n Arm n Forearm n Hand ¨ Lower = n Thigh n Leg n Foot leg

Pectoral Girdle (Shoulder Girdle) Clavicle – anterior: collar bone n Scapula – posterior: shoulder blade n

Scapula Glenoid cavity articulates with the humerus n Acromium articulates with clavicle n Coracoid process projects anteriorly n

Upper extremity n Arm or Brachium = upper arm ¨ n Forearm or Antebrachium ¨ n Between shoulder and elbow (humerus) 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 n Ilium n Ischium n Pubis

Lower limb n Thigh: femur n Leg (lower leg) ¨ Tibia ¨ Fibula n Foot

Right femur, anterior view

Right lower leg, anterior view

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