Exchange in alveoli, Biology

Exchange in Alveoli

The blood that enters the lungs from the heart has been routed through body tissue where mitochondria1 respiration has depleted its oxygen content. It thus has a low partial pressure of oxygen (Po2 = about 40 mm Hg). At the same time metabolic activity increases partial pressure of carbon dioxide in body tissue and partial pressure of carbon dioxide of blood entering the alveoli is 45 mm Hg. So compared to partial pressures in atmosphere blood entering lungs from the body tissue has low Po2 and high Pco2. The partial pressure of oxygen in alveoli is high and that of carbon dioxide is low so the gases diffuse only along their partial pressure gradient. The whole process of exchange is depicted in Figure.

74_Exchange in Alveoli.png

Figure: Exchange of respiratory gases in lungs and tissue cells. Numbers represent partial pressures in milli meters of mercury (mm Hg).

Posted Date: 1/15/2013 7:18:04 AM | Location : United States

Related Discussions:- Exchange in alveoli, Assignment Help, Ask Question on Exchange in alveoli, Get Answer, Expert's Help, Exchange in alveoli Discussions

Write discussion on Exchange in alveoli
Your posts are moderated
Related Questions
salient features of phylum Protozoa

Discuss important factor of obesity Weight is a most important factor for identifying obesity. Weight is measured in kilograms (kg). It is measured during the first visit and n

Measurements of the level of pollution There are many  factor for finding  the level of pollution in the waste waters that generally find out the quantity of organic matter susp

Q. Microorganisms on On basis of nutrient degradation capacity? On basis of nutrient degradation capacity: - Proteolytic: Microorganisms, which are capable of protein degra

In the long term reversible causes of heart failure like valvular lesions, myocardial ischemia, uncontrolled hypertension, arrhythmias, alcohol, negative inotropic agents, intracar

State the term - Functional neuroanatomy Functional neuroanatomy focuses on the study of anatomy using psychological measures. One application of this kind of research is to he

Q. Principal categories in classification? First of all there is a need to know what classification is? Let us define in simple term. Classification is placing of a plant (or g

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Define Principle for Simple Staining of Bacterial Cultures? In simple staining, a single staining agent preferably a basic dye is used. Commonly used basic stains are carbol fu

Q. How can the features of the arthropod exoskeleton describe the terrestrial adaptation of some species of the phylum? In the arthropod exoskeleton there is a layer of wax whi