longest and largest of upper limb

articulates with scapula and ulna and radius

goes from cylindrical shape to triangular[image]

radial fossa articulates with head of radius when forearm is flexed/bent

capitulum articulates with the head of the radius

Fossa- flexed forearm

coronoid fossa articulates with coronoid process of ulna when forearm flexed/bent

olecranon fossa recieves olecranon of ulna when forearm extended/straightened 

CF

OB

coronoid-flexed

oelcranon-extended

• both roughened areas
• attatch with biceps brachii muscle

Head of radius is proximal

Head of ulna is distal

of ulna--attatchment point for brachioradialis muscle and radial collateral ligament to wrist

of radius--attatchment point for ulnar collateral ligament to wrist

Ulna- pinky/medial side

radius- thumb/lateral side

R before U, and your thumb stops before your pinky!

[image]

1.) interosseous membrane 

2.)proximal raidoulnar joint

3.) distal radioulnar joint

PID

[image]

distal end of radius articulates with lunate, scaphoid, and triquetreum 

connnects Radius to Carpal bones

radio- carpal!

[image]