Difference between inhalation and exhalation

Difference Between Inhalation and Exhalation

Spread the Differences

Difference between Inhalation and Exhalation. When we hear the terms inhalation and exhalation we remember the process of breathing. Inhalation is that the process of taking in air containing oxygen, while exhalation is that the process of giving out rich containing carbon dioxide. Here one breath involves one complete inhalation and exhalation.

So breathing rate varies from one person to a different person and different sorts of activity they performed during a day. Though on average, the breathing rate of an adult is 15-18 times a minute, however, it may increase up to 25 times per minute just in case of heavy exercises, while running or fast walking.

This article is targeted at the breathing processes, which are inhalation and exhalation. Thus, we’ll consider the essential difference between Inhalation and Exhalation with a short description.

Difference between Inhalation and Exhalation
Inhalation vs exhalation

What is Inhalation?

Inhalation also can be called ‘Breathing In‘. After we breathe in or inhale the air through nostrils, it then passes through the nasal cavity, from here the air which has high oxygen reaches the lungs through the windpipe. The lungs which are located within the chest cavity are surrounded by the ribs, which form the cage-like structure called rib-cage, and features a large muscular sheet referred to as a diaphragm, which lies at the underside of the cavity.

When the oxygen which is rich within the air reaches here the diaphragm contracts or tightens and move downward. The space within the chest cavity increases, the place into which the lungs get expand. The chest cavity also gets enlarged because of intercostal muscles present between the ribs. This helps within the contraction and pulling of the rib cage both outward and upward.

As soon because the lungs expand, air enters through the nose or mouth. This air travels downward through the windpipe and into the lungs. The air passes to the nearby blood vessel. Now, this oxygen moves to the blood from the air cavity with the assistance of a protein called hemoglobin.

Simultaneously, on the opposite side, the carbon dioxide also shifts. The movement of gas is through the artery into the bloodstream from the right side of the heart. Further, this blood which is rich in oxygen is carried to the pulmonary veins through a network of blood vessels. The role of the pulmonary vein is to deliver oxygen-rich blood to the left side of the heart. This side of the heart pumps the blood to the rest of the body. From there the blood moves into the surrounding tissues

What is Exhalation?

It is additionally referred to as ‘Breathing Out‘. The process is opposite thereto of inhalation. In this, the diaphragm gets relaxed and moves upward into the chest cavity. Even the intercostal muscles between the ribs also get relax, which reduces the area within the chest cavity. Gradually, the area within the chest gets decreased and air rich in CO2 is forced to move out of the lungs and windpipe and finally out through the nose.

There may be a lot of confusion between breathing and respiration, so it is often simply understood by saying that breathing involves the method of exchanging gases like oxygen and carbon dioxide from the lungs with the assistance of varied respiratory organs. While respiration may be a complete biochemical process, where the cells of organisms gain energy by combining oxygen and glucose, which ends in giving out CO2, ATP (adenosine triphosphate), and water.

Difference between Inhalation and Exhalation

Inhalation is the process of intake of air into the lungs. Exhalation is the process of letting air out from the lungs.
Type of process
Inhalation is an active process. Exhalation is a passive process.
The role of intercostal muscle
Internal intercostal muscles relax and external costal muscles contract. Internal intercostal muscles contract and external intercostal muscles relax.
The role of the diaphragm
They contract during the inhalation and get flattens by moving down. They relax during exhalation and turned into dome-shaped by moving up.
The size of the chest cavity
Increases. Decreases.
The volume of the lungs
It increases during inhalation means it gets inflated. It decreases during exhalation means it gets deflated.
intercostal muscles
Due to the effect of intercostal muscles rib cage moves upward and outward. Due to the effect of intercostal muscles the rib cage moves downward.
Air rich in oxygen is taken into the blood. Carbon dioxide is pushed out.
composition of air
The air which is inhaled is oxygen and nitrogen mix. The air which is exhaled is carbon dioxide and nitrogen mix.
Air pressure
Decrease in air pressure Increase in air pressure.


So we are able to say that the giving and taking process is termed breathing. During this process, while breathing we take in air rich in oxygen from the atmosphere and provides out the CO2 back to the atmosphere. This carbon dioxide which is realized is used by the plant during the daytime within the process of photosynthesis. And hence the cycle goes on continuously, which is significantly important for all living beings. This is about the Difference between Inhalation and Exhalation

you can check more from https://medlineplus.gov/ency/anatomyvideos/000018.htm

Spread the Differences

Leave a Comment

content of this page is protected
Scroll to Top