Transport Of Oxygen

Organism gets oxygen from the environment environment diffusion over alveolo-capillary membrane. The latter is important for  aerobic metabolism  and normal functioning organism.

Oxygen is in the blood bound to hemoglobin → oxyhemoglobin; in dissolved form is his amount minimal.

→ quantity of hemoglobin ( Hb ) in erythrocyte ] ] ech indicates  transport the blood 's capacity for [[ oxygen  .
 * 1 g Hb = 1.39 ml oxygen  → 150 g Hb in 1 liter of blood = 200 ml of oxygen → at minute cardiac volume 5 l is therefore 1 L of oxygen transferred for a minute.


 * Concentration oxygen we express  partial by pressure  ( pO 2).


 * Saturation Hb oxygen indicates ' saturation . It is expressed in percentages.


 * Body an adult a person at peace consumes approx. 250 ml of oxygen / min.


 *  Quantity of oxygen in the blood = 1.39 x amount Hb vg/lx saturation in %.

Influence bonds of oxygen
Custody oxygen on Hb is affected by :
 *  by temperature  ( tissues, environment ),


 * Blood pH


 *  pCO 2,

At work tissue is released larger amount of CO2, is formed heat and influence creation acidic substances, the pH is lowered - this all supports release of oxygen from Hb. Custody so there is oxygen addicted on  metabolic claims organism , on his consumption.
 * → high pCO 2 and  decreasing pH decreases affinity Hb to oxygen.

 Increase supplies of oxygen  can ensure for normal ones circumstances  by increasing ventilation  ( increase breath . frequency and volume ) and  acceleration Cardiac heart rate action . By influencing these parameters organism compensates increased enjoyment oxygen in tissues.

 Increase amount dissolved of oxygen in the blood you can reach hyperbaric oxygen therapy . _ _

Related articles
Oxygen transport blood ]]
 * Binding oxygen to hemoglobin


 * Oxygen parameters

Used literature
