2Pectoral Girdle Composed of 2 clavicles & 2 scapulae Open in the back between the scapulaeSternum separates its bone in the frontSupports the upper limbsAn attachment for several muscles that move the upper limbs
3Clavicle Also known as- Collar Bone Located at the base of the neck Run horizontally between the manubrium(sternum) & scapula.Provides attachments for muscles of the upper limbs, chest, & back
4Scapula Shoulder Blade Triangular-shaped bone Spine- divides the posterior surface into unequal portions. Leads to 2 processes:Acromion Process- forms the tip of the shoulder. Articulates w/ the clavicle & provides attachments for muscles of the upper limb & chest.Coracoid Process-(Corac-) curves to the clavicle. Provides attachments for upper limb & chest muscles
5Glenoid Cavity- located between the 2 processes Glenoid Cavity- located between the 2 processes. Articulates with the head of the humerus.
7Humerus Extends from the scapula to the elbow Head fits into the ??? Glenoid Cavity of the scapula2 processes located just below the head1. Greater Tubercle- lateral side2. Lesser Tubercle- anterior sideIntertubercular Groove- A narrow furrow located “between tubercles”
8Deltoid tuberosity – v-shaped, rough area where _________ muscles attach to humerus This muscle raises the upper limb horizontally to the side.Olecranon fossa – posterior depression that receives an ulnar process when elbow is straightenedCoronoid fossa – anterior depression that receives a radial process when elbow is bent
9Radius Thumb side of the forearm Extends from the elbow to the wrist Disc-like “Head” at upper end of the radius articulates w/ the humerus & a notch of the ulna. (so your arm can rotate)Radial tuberosity- a process below the head, provides attachment for bicepsStyloid process – at distal end; attachment for wrist ligaments
10Ulna Longer than the radius Trochlear notch- proximal end; wrench like opening that articulates with the humerus.Olecranon process – top processCoronoid process – bottom processRadial notch – just below trochlear notchHead – at distal end; articulates with ulnar notch of radiusStyloid process – attachment for wrist ligaments