2 Pectoral 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
3 Clavicle 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
4 Scapula 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
5 Glenoid Cavity- located between the 2 processes Glenoid Cavity- located between the 2 processes. Articulates with the head of the humerus.
7 Humerus 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”
8 Deltoid 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
9 Radius 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
10 Ulna 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