Structural and Functional Differences Between Right and Left Lung
The work of the respiratory system of the body is to extract oxygen from the atmosphere and transfer it to the bloodstream. It also collects carbon dioxide from the body and releases it into the atmosphere. Lungs are a critical part of the respiratory system and are located in the thoracic cavity of the chest. They are conical in shape and are divided by lobes and fissure.
Overview of Lungs
The two lungs are known as the left lung and the right lung. The primary function of the lungs is to breathe in oxygen and breathe out carbon dioxide but there is a difference between the right and left lungs based on several factors. The experts at Vedantu have summarised these lung differences between right and left in an easy to understand format.
Left Lung
The left lung is located on the left of the heart and has a concave impression to accommodate the heart. This impression is known as the cardiac notch and it makes the left lung smaller than the right one. An important difference between the right lung and the left lung is the size.
Right Lung
The right lung is located on the right side of the respiratory system and is shorter than the left lung. It is to accommodate the diaphragm, which rises higher towards the right side over the liver.
FAQs on Difference Between Right And Left Lung in Human Respiratory System
1. What is the main difference between the right and left lung?
The main difference between the right lung and the left lung is that the right lung has three lobes while the left lung has two lobes.
- The right lung is divided into superior, middle, and inferior lobes.
- The left lung has only superior and inferior lobes.
- The left lung is slightly smaller to accommodate the heart.
2. Why is the left lung smaller than the right lung?
The left lung is smaller because it makes space for the heart on the left side of the chest cavity.
- The heart occupies a region called the cardiac notch on the left lung.
- This reduces the overall width and volume of the left lung.
- The right lung does not share space with the heart, so it is broader and larger.
3. How many lobes are present in the right and left lungs?
The right lung has three lobes, while the left lung has two lobes.
- Right lung: superior lobe, middle lobe, and inferior lobe.
- Left lung: superior lobe and inferior lobe.
4. What is the cardiac notch in the left lung?
The cardiac notch is a deep indentation on the anterior border of the left lung that accommodates the heart.
- It is present only in the left lung.
- It reduces the size of the left lung compared to the right.
- It allows close positioning of the heart within the thoracic cavity.
5. Which lung is larger and heavier, right or left?
The right lung is larger and heavier than the left lung.
- It has three lobes, increasing its volume.
- It does not have a cardiac notch.
- It is generally wider and shorter than the left lung.
6. What are the structural differences between the right and left bronchi?
The right primary bronchus is shorter, wider, and more vertical than the left primary bronchus.
- The right bronchus is about 2–3 cm long and more vertical.
- The left bronchus is longer, narrower, and more horizontal.
- Foreign objects are more likely to enter the right bronchus due to its vertical orientation.
7. Do both lungs perform the same function?
Yes, both the right and left lungs perform the same primary function of gas exchange.
- They contain millions of alveoli where oxygen enters the blood.
- Carbon dioxide is removed from the blood and exhaled.
- Both lungs work together in the process of respiration.
8. What are the fissures present in the right and left lungs?
The right lung has two fissures, while the left lung has one fissure.
- The right lung has a horizontal fissure and an oblique fissure.
- The left lung has only an oblique fissure.
9. What is the lingula in the left lung?
The lingula is a tongue-like projection of the superior lobe of the left lung.
- It is located near the cardiac notch.
- It is considered structurally similar to the middle lobe of the right lung.
- It helps maintain symmetry between the two lungs.
10. How does the shape of the right lung differ from the left lung?
The right lung is shorter and wider, while the left lung is longer and narrower.
- The right lung is shorter due to the position of the liver pushing the diaphragm upward.
- The left lung is narrower because of the space occupied by the heart.
- Both lungs are conical in shape with an apex and a base.
