The fasciae vary in thickness and density and in the amounts of fat, collagenous fiber, elastic fiber, and tissue fluids which they contain.
Three kinds of fasciae are deep fascia, subcutaneous fascia, and subserous fascia; all of which are located in this fasci- unit.
It is subdivided into visceral abdominal fascia (internal organs of the abdomen), parietal abdominal fascia (connective tissue lining the wall of the abdominal cavity), and extraperitoneal fascia (thin layer of connective tissue and adipose or fat tissue).
It includes the muscular fascia which envelops the subclavius and pectoralis minor muscles and the strong membrane (costocoracoid membrane) formed in the interval between them, and the suspensory ligament of the axilla.
The clavipectoral fascia (and the muscles it envelopes) constitute the deep anterior wall of the axilla (armpit area).