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[[Image:PleuralMembranesSchematic.jpg|right|thumb|350px|'''Schematic Diagram of the Pleural Membranes''' (Cross section through thoracic cavity at the level of the heart)]]

[[Image:PleuralMembranesSchematic.jpg|right|thumb|350px|'''Schematic Diagram of the Pleural Membranes''' (Cross section through thoracic cavity at the level of the heart)]]

*Each lung is placed within a separatte layer of membrane, thus there are two pleural sacs.

*Each lung is placed within a separate layer of membrane, thus there are two pleural sacs.

*The space between the two sacs is known as the [[Mediastinum - Anatomy & Physiology|Mediastinum]].

*The space between the two sacs is known as the [[Mediastinum - Anatomy & Physiology|Mediastinum]], and is almost in the midline of the thorax.

*The pleura covering the surface of the lung is known as '''Pulmonary Pleura''' or '''Visceral Pleura'''. This becomes continuous with the '''Mediastinal Pleura''' as it wraps around the lung.

*The pleura covering the surface of the lung is known as '''Pulmonary Pleura''' or '''Visceral Pleura'''. This becomes continuous with the '''Mediastinal Pleura''' as it wraps around the lung.

*The '''Diaphragmatic''' and '''Costal Pleura''' are continuous with the Mediastinal Pleura. Together, these three membranes are the '''Parietal Pleura'''.

*The '''Diaphragmatic''' and '''Costal Pleura''' are continuous with the Mediastinal Pleura. Together, these three membranes are the '''Parietal Pleura'''.

==Species Differences==

==Species Differences==

*

*In '''Cattle''' the Mediastinum is a tough membrane, in contrast to '''Horses''' where it is rather thin and more delicate.

==Links==

==Links==