![]() ![]() Oblique fissure – Runs from the inferior border of the lung in a superoposterior direction, until it meets the posterior lung border.The lobes are divided from each other by two fissures: The right lung has three lobes superior, middle and inferior. The right and left lungs do not have an identical lobular structure. Borders (three) – The edges of the lungs, named the anterior, inferior and posterior borders.They are named costal, mediastinal and diaphragmatic. Surfaces (three) – These correspond to the area of the thorax that they face.Lobes (two or three) – These are separated by fissures within the lung.Base – The inferior surface of the lung, which sits on the diaphragm.It projects upwards, above the level of the 1st rib and into the floor of the neck. Apex – The blunt superior end of the lung.The left lung is slightly smaller than the right – this is due to the presence of the heart. The lungs are roughly cone shaped, with an apex, base, three surfaces and three borders. ![]()
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