The Appendicular Skeleton Salt Lake City Community College Human Anatomy Laboratory

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Transcript of The Appendicular Skeleton Salt Lake City Community College Human Anatomy Laboratory

The Appendicular Skeleton Salt Lake City Community College Human Anatomy Laboratory THE SKELETAL SYSTEM The 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) Tibia Fibula Foot Right femur, anterior view Right lower leg, anterior view Right foot, superior (dorsal) view and inferior (plantar) view