Each lung is surrounded by pleura, sac-like structures which prevent the lungs over-expanding and reduce friction between lungs during their expansion. They contain a small amount of pleural effusion (fluid) which keeps the lungs moist acting as a lubricant. Each pleura is made of two layers, parietal and visceral. The visceral membrane is continuous with the lungs and the parietal is on top of that (with the pleural fluid/effusion between).
Between the two lungs is a structure called the mediastinum, this is another sac-like structure which contains the pericardium (heart-sac), the heart, the major vessels leaving the heart, some of the oesophagus and trachea also enter it.
The space between the breasts is called the cleavage.
Mediastinum
The space between the 2 lungs is called the Mediastinum where the heart is located
The mediastinum.
plueral space
Mediastinoscopy
The pleural space is located between the two layers of the pleura, which are thin membranes that surround the lungs. The visceral pleura is the inner layer that covers the lung, and the parietal pleura is the outer layer that lines the chest cavity. The pleural space contains a small amount of fluid that helps reduce friction during breathing.
mediastinummediastinumThe mediastinum is the space between the lungs.
The space between the lungs in the chest is called the mediastinum. Its function is to house and protect vital organs such as the heart, major blood vessels, esophagus, trachea, and lymph nodes. It also allows for the passage of nerves and blood vessels to and from the upper body.
Pleural cavity
this is the thoracic cavity, the space between the neck and the abdomen, this contains the lungs, heart & the main artery called the aorta, the lungs are covered by a membrane called the pleura which holds the lungs in situ and is the area affected by pleurisy, if air or gasses are allowed to permeate this area outside the lungs the vacuum that enables breathing is compromised and a collapsed lung can occur.
The potential space between the pleural membranes is called the thoracic cavity. This is also known as the pleural cavity in some instances.