The scapula :

The Scapula is 2nd bone of the upper extremity. It is one types of flat bone and triangular shaped.

It has three borders :

• 1) Superior border
• 2) Lateral border
• 3) Medial border (thin and sharp)

It has three Angles :   

• 1) Superior angle
• 2) Inferior angle
• 3) Lateral angle

It has two surface :      

• 1) Costal surface or Anterior surface – It is Concave forwards
• 2) Dorsal surface
  • Dorsal surface is divided spine :      
    • 1) Supra spinous fossa
    • 2) Infra spinous fossa

It has three process : 

• 1) Acromion process
• 2) Coracoid process
• 3) Spine process

It has two notch :       

• 1) Scapular notch
• 2) Spinoglenoid notch

It has one Cavity:

It’s name is Glenoid cavity. It is situated laterally.

Next : The Humerus.