What Is the Anatomy of the Lungs?

The surface anatomy of the lung is a projection of the surface of the leading edge of the lung from left to right. The upper right end starts from behind the sternoclavicular joint, and descends inward to the midpoint of the sternum, and then descends slightly to the 6th costal cartilage at the lower edge of the lung. The left side is consistent with the right side above the 4th costal cartilage, turning downwards to the outside, up to 5 cm from the midline, forming a cardiac notch. ^[1]