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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

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appendicular skeleton2
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]

slide3

Pelvic Girdle – 2 bones

  • Lower 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 skeleton
  • Provides support for body weight
slide4

Hip / Coxal bones [ ossa coxae, innominate bones]

Ilium – ASIS, PSIS

Ischium - tuberosity

Pubis - rami

Symphysis pubis

Obturator foramen

Acetabulum

lower extremity
Lower Extremity
  • Leg [thigh] – femur

Head

Fovea capitis

Neck

Trochanters – greater/lesser

Condyles – medial/lateral

Epicondyles

lower extremity9
Lower Extremity

*Leg – region between knee and ankle

  • Fibula – lateral bone
  • Tibia – medial bone

Malleolus

Condyles – medial/lateral

Tibial tuberosity

slide11

Patella [kneecap] a flat, triangular sesamoid bone

Enclosed within the quadriceps tendon

ankle or tarsus
Ankle or Tarsus

Contains 7 tarsal bones

Calcaneous = heel bone

Talus

Cuboid

Navicular

Cuneiforms – lateral, intermediate & medial

slide13
Foot
  • Metatarsals – not named, but numbered 1 – 5 starting at medial side
  • Toes – phalanges or digits: 3 bones [proximal, distal & middle] for each toe, except big [great] toe which has 2 [no middle phalanx]
pectoral or shoulder girdle
Pectoral or Shoulder Girdle
  • Clavicle [collarbone] – ‘S’ shaped bone * most frequently fx’d bone of body
  • Scapula [shoulder blade] – thin, flat, triangular bone.
  • Acromion
  • Spine
  • Coracoid process
  • Gleniod fossa/cavity
upper extremity
Upper Extremity
  • Arm [brachium] humerus

Head

Tubercles – greater/lesser

Epicondlyes – medial/lateral

Olecranon fossa

Capitulum

Trochlea

upper extremity19
Upper Extremity

*forearm – region between elbow and wrist

  • Ulna

Olecranon process

  • Radius

head

Styloid process

wrist or carpus
Wrist or Carpus
  • Contains 8 carpal bones

Bound tightly by ligaments

Arranged in 2 rows

Scaphoid Trapezium

Lunate Trapezoid

Triquetral Capitate

Pisiform Hamate

slide24
Hand
  • Metarcarpals – not named, but numbered 1-5 starting on lateral [thumb] side
  • Fingers – phalanges or digits: 3 bones [proximal, distal & middle] for each finger, except thumb, which has 2 [ no middle phalanx]