For those who are not aware, the cardiac notch is something that is only available in the left lung because this is near where the heart is located. Humans only have one heart and it would only need one cardiac notch. The horizontal fissure is located in the middle to the upper lobe of the right lung.
The left lung does not have a horizontal fissure. The oblique fissure is something that is located in both lungs. The superior lobal bronchus is also something that can be found in both lungs. When it comes to lobes, the right lung has three lobes while the left lung has two lobes.
Cardiac notch-the cardiac notch is only found on the left lung, which makes sense since the heart is located on the left side of the mediastinum. the horizontal fissure is a deep groove that separates the middle lobe from the upper lobe of the right lung. the left lung does not have a horizontal fissure. the oblique fissure is found in both lungs. it separates the upper lobe from the lower lobe in both lungs and the middle lobe from the lower lobe in the right lung. both lungs also have a superior lobar bronchus leading to their superior lobes. finally, the right lung has three lobes while the left lung has two lobes.