The Humerus :

The humerus is the 3rd bone of the upper extremity. It is the long bone. It has two end and one shaft.

It has two ends :  

• 1) upper end
• 2) lower end

1. Upper end has :     

• 1) Head of the humerus
• 2) Greater tuberosity
• 3) Lesser tuberosity
• 4) Anatomical neck 
• 5) Surgical neck
• 6) Bicipital grove

2. Lower end has two parts :   

• I) Articular part
• II) Non-articular part

I. Articular part has :               

• 1) Capitulum
• 2) Trochlea

II. Non articular part has :         

• 1) Medial epicondyle
• 2) Lateral epicondyle
• 3) Medial supra condyler ridge
• 4) lateral supra condyler ridge
• 5) Olecranon fossa
• 6) Coronoid fossa
• 7) Radial fossa

Shaft or Body :

Shaft has One Tubersity. It’s name Deltoid tubersity.

Shaft has three border and three-surface

Three border :   

• 1) Anterior border
• 2) Media! border
• 3) Lateral border

Three surface :  

• 1) Antero medial surface
• 2) Antero lateral surface
• 3) Posterior surface.

To learn more : Visible Body