Q:

Why does the right lung have three lobes?

A:

Quick Answer

The right lung has three lobes because it does not have to make as much room for the heart. The left lung has two lobes because the heart is found just left of center in the chest.

Know More

Full Answer

The left lung has a cardiac impression to make room for the heart. Some scientists believe that the left lung once had a third lobe, but it was lost over time.

The right lung not only has more lobes than the left, but it's larger, heavier and has more capacity. It's separated into the superior, middle and inferior lobes. These lobes in turn are separated from each other by the upper and lower fissures. The upper and lower lobes are about the same shape and size as the lobes of the left lung. The middle lobe, which only the right lung has, is the smallest of the three.

The right lung does have an area where it accommodates the lining around the heart, or pericardium, but it's not as deep as the left lung's cardiac impression. It also has an arch that makes room for the azygos vein, which brings deoxygenated blood to the superior vena cava. There are also furrows for the superior and inferior vena cavae and the innominate vein and artery.

Learn more about Organs

Related Questions

  • Q:

    What is the function of the bronchi?

    A:

    Bronchi are the transition structures that air travels through between the right and left main bronchus, and the very small bronchioles. The air first travels from the mouth or nose through the larynx and trachea, and then the main bronchus.

    Full Answer >
    Filed Under:
  • Q:

    What does the parietal lobe do?

    A:

    On the right and the left side of the brain, the parietal lobe processes sensory information, and on the left side it assists with planning movements, language, writing and arithmetic. It plays a particularly strong role in spatial awareness, as well as distinguishing between objects based on touch.

    Full Answer >
    Filed Under:
  • Q:

    How can a punctured lung be repaired?

    A:

    A punctured lung, also called pneumothorax, is repaired through the use of oxygen and a chest tube, which gets rid of air that accumulates between the inside of the chest and the outside of the lung, states FreeMD. Severe traumatic pneumothorax may require surgery to repair the damaged lung.

    Full Answer >
    Filed Under:
  • Q:

    What is the normal lung capacity for a person?

    A:

    A person's average total lung capacity is about 5.8 liters and is typically only reached during strenuous physical activity. A person's normal inspiration, or intake of air, is about 0.5 liters, according to hypertextbook.

    Full Answer >
    Filed Under:

Explore