The%20Appendicular%20Skeleton

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The Appendicular Skeleton
Salt Lake City Community College Human Anatomy
Laboratory
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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

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Pectoral Girdle(Shoulder Girdle)

• Clavicle anterior collar bone
• Scapula posterior shoulder blade

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Scapula

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

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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)

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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

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Right humerus, anterior view
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Right forearm bones, anterior view
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Hip bone (os coxae) 3 separate bones in
childhood which fuse

• Ilium
• Ischium
• Pubis

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Lower limb

• Thigh femur
• Leg (lower leg)
• Tibia
• Fibula
• Foot

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Right femur, anterior view
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Right lower leg, anterior view
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Right foot, superior (dorsal) view and inferior
(plantar) view