Only the left lung has these features.
The cardiac notch is a feature of the left lung that accommodates the position of the heart. It allows the heart to fit snugly within the thoracic cavity and provides space for its proper functioning.
to accommodate the heart
LEFT
The left lung has a cardiac notch at its inferior medial end to accommodate the position of the heart. This notch allows space for the heart to fit into the left lung, preventing compression of the heart by the lung during breathing movements.
the left lung is narrower than the right lung because of the amount of space the mediastinum (which includes the heart, blood vessels and others) on the left side. the left lung includes a cardiac notch where the heart lies.
The left is smaller, due to the presence of cardiac notch
A deep notch in the alimentary canal at the junction of the esophagus and the stomach.
Human lungs aren't the same shape on opposite sides of the body because the heart sits slightly to the left of the midline. To make room for the heart in humans, the left lung has a cardiac notch, which isn't found on the right lung.
The left lung is slightly smaller than the right lung because 2/3 of the heart is located there. The left lung contains the cardiac notch, an indentation in the lung that surrounds the apex (pointed end) of the heart. The smaller left lung only has 2 lobes, the superior and inferior.
A deep notch in the alimentary canal at the junction of the esophagus and the stomach.
If the breathing difficulty is due to cardiac failure it will be cardiac transplant, and if it is due to lung failure it will be lung transplant