Download Pectoral Girdle

Pectoral Girdle
Clavicle
• Have 2
• “collar bone”
• Provides some
shoulder stability
• Attachment site for
muscles
Scapulae
• Have 2
• “shoulder blade”
• Spine: on posterior
Scapula
• Acromion Process: tip
of shoulder,
articulates with
clavicle
• Coracoid Process:
attachment site for
muscles
• Glenoid Cavity:
articulates with
humerus
Humerus
• Have 2
• Upper arm bone
• Head: fits with glenoid
cavity
• Greater Tubercle: on
lateral side
• Lesser Tubercle: on
anterior side
• Deltoid Tuberosity:
attachment site for
muscles
Humerus
• Olecranon Fossa:
posterior depression
• Lateral and Medial
Epicondyles:
attachment site for
muscles
• Capitulum: lateral
• Trochlea: medial
• Coronoid Fossa:
anterior depression
Radius
• Have 2
• On thumb side of forearm
• Head: circular, allows for
rotation
• Radial Tuberosity:
attachment site for
muscles
• Styloid process:
attachment site for
ligaments
Ulna
• Have 2
• Forearm
• Trochlear Notch:
articulates with humerus
• Olecranon Process:
muscle attachment
• Coronoid Process:
muscle attachment
• Styloid Process: ligament
attachment
Hand
• 28 bones in each
hand
• Carpals (8 in each
hand)
• Metacarpals (5 in
each hand)
• Phalanges (14 in
each hand)
Carpals
• In wrist
• 2 rows of 4:
• Proximal Row from thumb
to pinkie:
–
–
–
–
Scaphoid
Lunate
Triquetrum
Pisiform
• Distal Row from thumb to
pinkie:
–
–
–
–
Trapezium
Trapezoid
Capitate
Hamate
Metacarpals
• One bone per finger
• Form palm of hand
• Numbered 1-5
beginning with thumb:
–
–
–
–
–
Metacarpal 1
Metacarpal 2
Metacarpal 3
Metacarpal 4
Metacarpal 5
Phalanges
• 14 in each hand
• Finger bones
• Each Finger has 3:
proximal, middle, and
distal
• Each thumb has 2:
proximal and distal
• Example: wear
wedding ring over
proximal phalange 4