QS Study

Endothoracic fascia: It is a layer of loose areolar tissue similar to the fascia transversalis of the abdomen. Fascia is a sheet or band of fibrous tissue such as lies deep to the skin or invests muscles and various body organs. It is created by the condensation at the internal surface of the thoracic cavity. It consists of inconsistent quantities of fat. It divides an internal mammary artery from the pleura.

Situation

It lies outside the pleura as the lining of the thoracic wall. This fascial layer is the outermost membrane of the thoracic cavity. This fascia contains variable amounts of fat.

Fig: Endothoracic Fascia

Functions

It binds the parietal pleura to the inner side of the chest wall and transverses thoracic muscle where these exist.

Composition

  1. Loose areolar tissue.
  2. Some fibrous tissue.

The fibrous tissue is responsible for the attachment of parietal pleura & pericardium on the upper surface of the diaphragm which is adherent & cannot be separated. The structures in the mediastinum are covered by loose connective tissue and it also lines the internal surface of the thoracic cavity.

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