Difference Wiki

Inspiration vs. Expiration

The main difference between Inspiration and Expiration is that Inspiration (inhalation) is the method of taking air from the outside into the lungs, whereas Expiration (exhalation) is the method of releasing air from the lungs to the outside.

Key Differences

The inspiration is known as the active process, which brings air into the lungs, while the expiration is the passive method that excludes air out of the lungs to the outer environment.
The intercostal muscles present outside contracts, and the intercostal muscles inside become relaxed during inspiration, while the outside intercostal muscles during expiration relaxed and internal intercostal muscles contract.
Janet White
Mar 29, 2020
During the inspiration process, the inspired air consist of oxygen-nitrogen mixture; on the other hand, during the expiration process, the expired air consist of the mixture of carbon dioxide and nitrogen.
The method of inspiration is also called as the inhalation process; on the flip side, the act of expiration is also known as the exhalation process.
During inspiration, the mass of the chest cavity increase, whereas during the process of expiration, the mass of the chest cavity decreases.
The function of intercostal muscles includes forward and outward movement of the rib cage in inspiration; on the other hand, the function of intercostal muscles during expiration is the downward and inward movement of the rib cage.
Harlon Moss
Mar 29, 2020
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In the gaseous exchange, oxygen enters into the lungs in the course of inspiration; on the contrary, during expiration, carbon dioxide is removed from the lungs.

Comparison Chart

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The method of taking air into the lungs is known as inspiration.
The act of expulsion of the air out from the lungs is known as the expiration.

Also Known As

Inspiration is also known as the inhalation process
Expiration is also known as the exhalation process

Active or Passive

An active process
A passive process

Diaphragm

The diaphragm moves towards down by contraction and becomes flat
The diaphragm moves up through relaxing and change into dome-shaped
Harlon Moss
Mar 29, 2020

Intercostal Muscles

The external intercostal muscles contract and on the other hand the internal intercostal muscles relax
The outer intercostal muscles relax while the internal intercostal muscles contract
Harlon Moss
Mar 29, 2020
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Intercostal Muscles Function

The rib cage moves forward and towards outward during the process through the action of intercostal muscles
The rib cage moves downward and towards inward during the process by the action of intercostal muscles
Aimie Carlson
Mar 29, 2020

The Size of the Chest Cavity

The size of the chest cavity increases
The size of the chest cavity decreases

Air Pressure

The air pressure inside the lungs decreases because of the increase in the volume of the chest cavity
The air pressure inside the lungs increases due to the decrease in the volume of the chest cavity
Aimie Carlson
Mar 29, 2020

The Movement of Air

Air moves towards the lungs
Air moves out of the lungs

Gas Exchange

Oxygen moves inward the lungs
Carbon dioxide is taken out from the lungs
Aimie Carlson
Mar 29, 2020

Chemical Composition of Air

Inspired air consist of an oxygen-nitrogen mix
Expired air consist of carbon dioxide-nitrogen mix
Samantha Walker
Mar 29, 2020
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Internal Pressure

The pressure of air in the lungs is less than the atmospheric pressure
The pressure of the air inside the lungs is higher than the atmospheric pressure
Harlon Moss
Mar 29, 2020

Inspiration and Expiration Definitions

Inspiration

The excitement of the mind or emotions to a high level of feeling or activity
A singer who found her inspiration in popular songs of the 1920s.

Expiration

The act of coming to a close; termination
The expiration of a contract.

Inspiration

The condition of being so excited
Sat down to write in a sudden burst of inspiration.

Expiration

The act of breathing out; exhalation.

Inspiration

The quality of being so excited, as manifested in something
A painting full of inspiration.

Expiration

(Archaic) Death.

Inspiration

A person or thing that moves the intellect or emotions or prompts action or invention
Gandhi has been an inspiration to political reformers for decades.

Expiration

The act of expiring.

Inspiration

Something, such as a sudden creative act or idea, that is inspired
Had an inspiration and saw a way to solve the problem.

Expiration

The act or process of breathing out, or forcing air from the lungs through the nose or mouth
Respiration consists of inspiration and expiration

Inspiration

Divine guidance or influence exerted directly on a human mind or soul.

Expiration

Emission of volatile matter; exhalation.

Inspiration

The act of drawing in, especially the inhalation of air into the lungs.

Expiration

(euphemism) The last emission of breath; death.

Inspiration

The drawing of air into the lungs, accomplished in mammals by elevation of the chest walls and flattening of the diaphragm, as part of the act of respiration.

Expiration

A cessation, extinction, ending

Inspiration

(countable) A breath, a single inhalation.

Expiration

That which is produced by breathing out, as a sound.

Inspiration

A supernatural divine influence on the prophets, apostles, or sacred writers, by which they were qualified to communicate moral or religious truth with authority; a supernatural influence which qualifies people to receive and communicate divine truth; also, the truth communicated.

Expiration

The act of expiring
The true cause of cold is an expiration from the globe of the earth.

Inspiration

The act of an elevating or stimulating influence upon the intellect, emotions or creativity.
She was waiting for inspiration to write a book.
Usage notes: In this sense, it may be followed by the adposition to in relation to the person being influenced, and for or to in relation to the idea or activity:

Expiration

The last emission of breath; death.

Inspiration

A person, object, or situation which quickens or stimulates an influence upon the intellect, emotions or creativity.
The trip was an inspiration to her for writing a book.

Expiration

That which is expired; matter breathed forth; that which is produced by breathing out, as a sound.
The aspirate "he," which is . . . a gentle expiration.

Inspiration

A new idea, especially one which arises suddenly and is clever or creative.

Expiration

A coming to a close; cessation; extinction; termination; end.
Before the expiration of thy time.

Inspiration

The act of inspiring or breathing in; breath; specif. (Physiol.), the drawing of air into the lungs, accomplished in mammals by elevation of the chest walls and flattening of the diaphragm; - the opposite of expiration.

Expiration

A coming to an end of a contract period;
The expiry of his driver's license

Inspiration

The act or power of exercising an elevating or stimulating influence upon the intellect or emotions; the result of such influence which quickens or stimulates; as, the inspiration of occasion, of art, etc.
Your father was ever virtuous, and holy men at their death have good inspirations.

Expiration

Euphemistic expressions for death;
Thousands mourned his passing

Inspiration

A supernatural divine influence on the prophets, apostles, or sacred writers, by which they were qualified to communicate moral or religious truth with authority; a supernatural influence which qualifies men to receive and communicate divine truth; also, the truth communicated.
All Scripture is given by inspiration of God.
The age which we now live in is not an age of inspiration and impulses.

Expiration

The act of expelling air from the lungs

Inspiration

Arousal of the mind to special unusual activity or creativity

Inspiration

A product of your creative thinking and work;
He had little respect for the inspirations of other artists
After years of work his brainchild was a tangible reality

Inspiration

A sudden intuition as part of solving a problem

Inspiration

(theology) a special influence of a divinity on the minds of human beings;
They believe that the books of Scripture were written under divine guidance

Inspiration

Arousing to a particular emotion or action

Inspiration

The act of inhaling; the drawing in of air (or other gases) as in breathing

Inspiration vs. Expiration

Inspiration is also known as the inhalation, considered as the process of drawing air inside the lungs. Expiration, also called the exhalation, viewed as the process of releasing air to the outside from the lungs through mouth or nose.

During inspiration and taking air into the lungs, the diaphragm moves towards down by contraction and becomes flat; on the other hand, during expiration, when air moves out from the lungs, the diaphragm moves up by relaxing and change into dome-shaped. Moreover, during the process of inspiration, the outer intercostal muscles contract. On the other hand, the internal intercostal muscles relax; on the flip side, during the process of expiration, the outer intercostal muscles relax while the internal intercostal muscles contract.

By the action of intercostal muscles, the rib cage moves forward and towards outward during the process of inspiration; on the contrary, through the action of intercostal muscles, the rib cage moves downward and towards inward during the process of expiration. During inspiration or inhalation, the size of the chest cavity increases; on the other hand, during the expiration or exhalation process, the size of the chest cavity decreases.

Due to the increase in the volume of the chest cavity during the act of inspiration, the air pressure inside the lungs decreases; on the flip side, due to the decrease in the volume of the chest cavity during expiration, the air pressure inside the lungs increases. In the course of inspiration, the air moves towards the lungs, while during the expiration, the air moves out of the lungs.

What is Inspiration?

Inspiration is known as the phase of taking air into the lungs during breathing. Inspiration is also known as the inhalation process, and it is an active process because it is the involvement of the contraction of the muscles.

Typically, in the process of regular inspiration, the two groups of muscles involved which are diaphragm and the outer intercostal muscles. In this process, the contractions occur in the diaphragm, moving it downward about the abdomen cavity and increasing the space of the thorax cavity.

In the meantime, the outer intercostals muscle contract and move the ribs outward and upward and expand the volume or quantity of the thoracic cavity. Besides, the enlargement of the thoracic cavity results in the intensifying of the lungs because of their adhesion to the pleural fluid. As a result, this expansion of the thoracic cavity is the decrease in intra-alveolar pressure, which is lower than the atmospheric pressure, and this pressure gradient results in the atmospheric pressure to enter into the lungs.

The process of inspiration is vital for taking oxygen inside the blood. The normal estimated air breathe consists of 21% of oxygen (O2) and 0.04% of carbon dioxide (CO2). The amount of needed oxygen increased when we do exercise, and this automatically increases the uptake of oxygen and makes breathing faster. This increased uptake of oxygen is known as VO2.

What is the Expiration?

Expiration is known as the passive process for taking out the air from the lungs. Normally, the liberating out the air from the lungs does not require any energy. So both the muscles diaphragm and external intercostal muscles become relax during expiration by recoiling the lungs.

The lessening of the diaphragm and intercostal muscles results in a decrease in the volume of the thoracic cavity and an increase in the interpulmonary pressure, which is higher than the atmospheric pressure. As a result, ultimately, the air which is present inside the lungs liberates out of the lungs.

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