upper margin of the lung is 5 cm above the clavicle
Answers
The right lung, which is heavier than the left, is also shorter (the right dome of the diaphragm being higher) and wider (the heart bulging more to the left).Because of the slope of the first rib, the cupola of the pleura and the apex of the lung project upward into the neck, posterior to the sternomastoid, and hence may be injured in wounds of the neck. Their highest point is 2 to 3 cm or more above the level of the medial third of the clavicle.The right lung is divided into upper, middle, and lower lobes by oblique and horizontal fissures, whereas the left lung has usually only upper and lower lobes, separated by an oblique fissure.The inferior limit of the lung that can be outlined by percussion extends laterally from the xiphisternal joint and about two intercostal spaces higher than the pleura. It crosses rib 6 in the midclavicular line and rib 8 in the midaxillary line and then proceeds toward the 10th thorac vertebra.