Human breathing

The Respiration at the Homme consists of exchanges between the atmosphere and the air cells which are ensured by the pulmonary ventilation in the state Gaz them. There exists also a method of Respiration based on the respiratory fluid . The exchanges air cells ↔ Sang are carried out by Diffusion alvéolo-capillary in the state dissolu.

At the time of the inspiration, the Air penetrates in the Poumon S; the Dioxygène (O₂) passes through the walls of the cells and is fixed on the Hématie S (red globules), while the Carbon dioxide dissolved in the Blood plasma passes him in the pulmonary air, and is expelled with the expiry.

Oxygenated blood is transported by the Artère S thanks to the action of the Cœur (Blood circulation) and is forwarded to the various bodies. There the cellular Respiration occurs: the dioxygene is used for a reaction of Oxydo-réduction which releases from the energy, energy stored in the form of Adénosine triphosphate to be used by the cell. This reaction produces carbon dioxide (CO₂) which dissolves in plasma and is forwarded to the lungs via the Veine S.

To each normal inspiration, 0,5 liter of air enters the lungs, that is to say approximately 8.000 liters per day or about 10 kg (knowing that one liter is equivalent to 1,29 G). The volume of air which penetrates “in more” during a forced inspiration is from 2,5 to 3 liters.

At the end of the normal expiry, one can still “drive out in more” 1 liter of air: a forced expiry is then carried out.

At the end of the forced expiry, there remain still 1,5 liter of air in the lungs; one can thus never empty them completely.

Volume of air inhaled (in liter per minute) in phase of:

rest: 6
walk: 15
walk with bicycle: 15
fast walk: 30
assembled staircase: 30 to 40
intensive bicycle or in coast: 60 to 100
race of endurance: 60 to 100

See too

Zh-min-nan: Ho͘-khip

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