Appendicular Skeleton

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    21-Jan-2016
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Appendicular Skeleton. Appendicular Skeleton. 126 bones – suspended by girdles from axial skeleton Designed for movement Pectoral girdle – 4 bones Upper extremity -Arm – 1 bone - forearm – 2 bones - hand = wrist, palm & fingers – 27 bones [each]. Pelvic Girdle – 2 bones - PowerPoint PPT Presentation

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  • Appendicular Skeleton

  • Appendicular Skeleton126 bones suspended by girdles from axial skeletonDesigned for movementPectoral girdle 4 bonesUpper extremity -Arm 1 bone - forearm 2 bones - hand = wrist, palm & fingers 27 bones [each]

  • Pelvic Girdle 2 bonesLower Extremity leg 1 bone - lower leg 2 bones - foot = ankle, instep & toes 26 bones [each ] - Patella 2 bones*Pelvic or Hip Girdle:Attaches the lower extremity to the axial skeletonProvides support for body weight

  • Hip / Coxal bones [ ossa coxae, innominate bones]Ilium ASIS, PSISIschium - tuberosityPubis - ramiSymphysis pubisObturator foramenAcetabulum

  • Lower ExtremityLeg [thigh] femurHeadFovea capitisNeckTrochanters greater/lesserCondyles medial/lateralEpicondyles

  • Lower Extremity*Leg region between knee and ankleFibula lateral boneTibia medial boneMalleolusCondyles medial/lateralTibial tuberosity

  • Patella [kneecap] a flat, triangular sesamoid boneEnclosed within the quadriceps tendon

  • Ankle or TarsusContains 7 tarsal bonesCalcaneous = heel boneTalusCuboidNavicularCuneiforms lateral, intermediate & medial

  • FootMetatarsals not named, but numbered 1 5 starting at medial sideToes phalanges or digits: 3 bones [proximal, distal & middle] for each toe, except big [great] toe which has 2 [no middle phalanx]

  • Pectoral or Shoulder GirdleClavicle [collarbone] S shaped bone * most frequently fxd bone of bodyScapula [shoulder blade] thin, flat, triangular bone. AcromionSpineCoracoid processGleniod fossa/cavity

  • Upper ExtremityArm [brachium] humerusHeadTubercles greater/lesserEpicondlyes medial/lateralOlecranon fossaCapitulumTrochlea

  • Upper Extremity*forearm region between elbow and wristUlnaOlecranon processRadiusheadStyloid process

  • Wrist or CarpusContains 8 carpal bonesBound tightly by ligaments Arranged in 2 rowsScaphoid TrapeziumLunate TrapezoidTriquetral CapitatePisiform Hamate

  • HandMetarcarpals not named, but numbered 1-5 starting on lateral [thumb] sideFingers phalanges or digits: 3 bones [proximal, distal & middle] for each finger, except thumb, which has 2 [ no middle phalanx]