Eupnea

In the human respiratory system

Respiratory system

The respiratory systems function is to allow gas exchange to all parts of the body. The space between the alveoli & the capillaries, the anatomy or structure of the exchange system, and the precise physiological uses of the exchanged gases vary depending on the organism...

, eupnea (Greek

Greek language

Greek , an independent branch of the Indo-European family of languages, is the language of the Greeks. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. In its ancient form, it is the language of classical...

 eupnoia; from eu, well + pnoia, breath) is normal, good, unlaboured ventilation, sometimes known as quiet breathing or resting respiration. In eupnea, expiration employs only the elastic

Elasticity (physics)

In physics, elasticity is the physical property of a material when it returns to its original shape after the stress under which it deforms is removed. The relative amount of deformation is called the strain.- Modelling elasticity :...

 recoil of the lungs

Human lung

The human lungs are the organs of respiration in humans. Humans have two lungs, with the left being divided into two lobes and the right into three lobes...

.

In the human respiratory system

Respiratory system

The respiratory systems function is to allow gas exchange to all parts of the body. The space between the alveoli & the capillaries, the anatomy or structure of the exchange system, and the precise physiological uses of the exchanged gases vary depending on the organism...

, eupnea (Greek

Greek language

Greek , an independent branch of the Indo-European family of languages, is the language of the Greeks. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. In its ancient form, it is the language of classical...

 eupnoia; from eu, well + pnoia, breath) is normal, good, unlaboured ventilation, sometimes known as quiet breathing or resting respiration. In eupnea, expiration employs only the elastic

Elasticity (physics)

In physics, elasticity is the physical property of a material when it returns to its original shape after the stress under which it deforms is removed. The relative amount of deformation is called the strain.- Modelling elasticity :...

 recoil of the lungs

Human lung

The human lungs are the organs of respiration in humans. Humans have two lungs, with the left being divided into two lobes and the right into three lobes...

.

See also

• Apnea
  Apnea
  Apnea, apnoea, or apnœa is a term for suspension of external breathing. During apnea there is no movement of the muscles of respiration and the volume of the lungs initially remains unchanged...
  
  , absence of respiration
• Bradypnea
  Bradypnea
  Bradypnea , British English spelling bradypnoea refers to an abnormally slow breathing rate...
  
  , slow respiration
• Dyspnea
  Dyspnea
  Dyspnea or dyspnoea , from Latin dyspnoea, from Greek dyspnoia from dyspnoos, shortness of breath) or shortness of breath is a debilitating symptom that is the experience of unpleasant or uncomfortable respiratory sensations...
  
  , difficult respiration
• Tachypnea
  Tachypnea
  Tachypnea is characterized by rapid breathing.It is not identical with hyperventilation - tachypnea may be necessary for a sufficient gas-exchange of the body, for example after exercise, in which case it is not hyperventilation.Tachypnea differs from hyperpnea in that tachypnea is rapid shallow...
  
  , fast respiration

During Eupnea, neural output to respiratory muscles is highly regular, with rhythmic
bursts of activity during inspiration only to the diaphragm and
external intercostal muscles