The upper lobe of the left lung is not the same part as the left lung apex; the upper lobe of the left lung includes the left lung apex, and the two are subordinate. The human lung is anatomically divided into three parts: the lung cusp, the lung base, and the lung body. The apices of the lungs are located about 2-3 centimeters above the inner 1/3 of the clavicle, and the tips of the apices usually protrude above the clavicle. The upper lobe of the left lung is anatomically defined as the lobe of the lung above the anterior aspect of the left oblique fissure is called the upper lobe of the left lung. The left lung cusp is defined as the bluntly rounded upper end of the lung called the left lung cusp, which protrudes upward past the upper thoracic opening into the base of the neck, beyond the medial 1/3 of the clavicle about 2-3 cm or so above the top of the pleura, immediately above the top of the pleura. So the upper lobe of the left lung includes the left lung apex, and the two are subordinate, not the same part.