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Inhalation is the process of taking air into the lungs. For this to occur, the air pressure inside the lungs must be lower than that of the external atmosphere as air flows from areas of higher pressure to lower pressure. This is achieved by the contraction of the external intercostal muscles and the relaxation of the internal intercostals which acts to pull the ribcage upwards and outwards, hence, increasing the volume of the thoracic cavity. The diaphragm also contracts to extend the cavity further downwards. Due to the function of the pleural membrane, the size of the lungs is increased which, in turn, creates an area of lower air pressure inside the lungs; hence, air is drawn into the lungs.

Exhalation is the process of expelling air out of the lungs. For this to occur, the air pressure inside the lungs must be higher than that of the external atmosphere as air flows from areas of higher pressure to ones of lower pressure. This is achieved by the relaxation of the external intercostal muscles which bring the rib cage inwards and the diaphragm bulges upwards (recoiling to its original shape) respectively. The internal intercostal muscles contract so as to pull the rib cage further inwards, hence, decreasing the volume of the thoracic cavity and that of the lungs which, in turn, creates high pressure in the lungs; hence air is pushed out of lungs. In passive breathing, the movements of the diaphragm are responsible - the ribs aren't needed.

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โˆ™ 2009-07-22 12:15:53
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Q: What happens during inhalation and exhalation?
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Related questions

What happens to chest cavity volume during inhalation and exhalation?

Chest cavity volume increases during inahalation, and decreases during exhalation.


What is the movement of ribcage during inhalation and exhalation?

During inhalation the ribcage expands, and during exhalation the ribcage contracts.


What happens after exhalation?

Inhalation?


What will happen to the diaphragm during inhalation and exhalation?

diaphragm will contracts, moves down and flattens when inhalation and diaphragm relaxes and curves upwards when exhalation :)


What is the difference between inhalation and exhalation?

the difference between inhalation and exhalation


Describe the movement of the ribcage and diaphragm during exhalation?

describe the movement of the ribcage and diaphragm during inhalation and exhalation


What is the differences between inhalation and exhalation?

The difference of inhalation and exhalation are, inhalation is inhaling the oxygen or the air , and exhalation is exhaling or breathe out


What happens to animals during respiraton?

Respiration is the exchange of gases such as oxygen and carbon dioxide, not to be confused with ventilation, which is inhalation and exhalation


What are inhalation and exhalation?

Inhalation means breathing in, and exhalation is breathing out.


Does the rib expand during inhalation or exhalation?

The ribs expand during inhalation. This creates negative pressure on the lungs and draws air into them. During exhalation the rib cage gets smaller, compressing the lungs, in a sense, and forcing air out.


How do inhalation and exhalation impact diaphragm movement?

Diaphragm movement impacts inhalation and exhalation. It moves upward on exhalation.


Are inhalation and exhalation the same as cellular respiration?

Inhalation and exhalation are not the same as cellular respiration.


What do you call a process which involves inhalation and exhalation?

External respiration involves inhalation and exhalation.


How do inhalation and exhalation work?

inhalation and exhalation work by breathing. and the pressure and volume are inversely proportional :)


What happen to diaphragm when one inhales and exhales?

It contracts during inhalation, relaxes during exhalation.


What are abnormal breath sounds heard during inhalation or exhalation called?

Crackles


What happens during exhalation?

what happens during exhalation?? answer: carbon dioxide is given off


Which phase of breathing inhalation or exhalation is considered active and passive?

Inhalation is an active process and exhalation is a passive process


What is an antonym for exhalation?

Inhalation


What happens during the passage of oxygen from the nasal passage to the bloodstream?

Inhalation is the act of taking air into the lungs. During inhalation, the diaphragm contracts. This causes the chest cavity to expand as the diaphragm moves down, allowing air to move into the lungs. During exhalation, the diaphragm relaxes and returns to its normal resting position.


Which phase of breathing (inhalation or exhalation) is considered active?

Inhalation is active, representing the contraction of the diaphragm. Exhalation is passive, caused by the relaxation of the diaphragm.


What muscle contract during inhalation and what muscles contract during exhalation?

The diaphragm (dye-uh-fram) muscle contracts during inhalations, and causes your belly to push out. During exhalation, the diaphragm muscles relax and your belly flattens back out.


What if there's no inhalation and exhalation?

we will die


What is the process of inhalation and exhalation?

Breathing


Inhalation and exhalation are referred to as?

Breathing

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