Anatomy of The Axilla

The axilla also called the is a small pyramidal space between the upper part of the arm and the chest wall. It resembles a four-sided pyramid and has four sides, as well as an apex and a base. The four sides are :

1. The Anterior Wall
2. The Posterior wall
3. The Medial wall
4. The Lateral Wall

Anatomy - Terms Used in Anatomy

What is anatomy?

nAnatomy is the study of the structure of an organism.

nHuman anatomy is the study of the structure of the human organism.

nAnatomy is derived from the Greek word anatome which means "cutting up". Its Latin equivalent is dissectio.

nAnatomy  has a wider scope than mere cutting up. It is the foundation of the whole art of medicine and introduces the student to most of the medical terminologies. It adheres to the Terminologica Anatomica.

Subdivisions of anatomy

Bones of the Upper Limb - The Clavicle

Let us Summarise the Clavicle in the shortest possible form we can.

The Clavicle is a long bone. It lies horizontal in the body. The clavicle acts as a strut that allows the the upper limb to fling away from the trunk.

As a long bone, the clavicle has a shaft and two ends - The medial end or the sternal end and the Lateral or Acromial end. 
The clavicle has the shape of a capital "S".
The shaft of the clavicle can be divided into three thirds - A medial two-third and a lateral one third. The medial two-third is convex anteriorly while the lateral one-third is concave anteriolry. The medial two-third of the clavicle has a round shape with four surfaces - the Anterior, Posterior, Superior, and The Inferior surface.