Aakash iTutor: PMT-Zoology Class 12th - Video Lectures for NEET

Now this case may is called calculate Carnegie, we can use a very easy method. Now we know that the atmospheric air. Atmospheric air at sea level. Has a pressure of 7 60 millimeter of mercury. So atmospheric aircraft sea level per itna pressure here up is may we know that oxygen is 21%. So Aga ham is 7 60 car 21% calculate cartage. So we will get the partial pressure of oxygen that will come out to be around one 59 MMO mercury. Or is partial pressure could be represent by writing up the gas here, as a liquor. So partial pressure of oxygen in the atmospheric air is one 59 MMO mercury. The accordingly ham or Sari guesses cubby calculated or age of partial pressure hamburgers they inhale, internally W gases, alveoli may poaching. So alveoli may say oxygen, they discern diffuser or uska partial pressure, and then blood may will bind with hemoglobin or transport hoagie. The high level part escape partial pressure may changes are in here. So let us first draw out a diagram so that all the partial pressures can be mentioned in it. Now for the exchange of gases, let us mention the different partial pressures.

 Suppose this is the structure for the alveoli or japura hamara circulatory system here we can represent it in this manner. Now let us say that this is the right side of the heart. Now right side of the heart say the blood hair will move in this direction and reaching towards the lungs. Exchange of gases about it is coming to the left side of the heart. Left atrium is for received occurring or fear left ventricle get through yeah, pass over and it will reach to the tissues and if here we are representing any of the tissue. So yay complete circulation Hogarth are use case may yield your blood vessel hopper in Coho, pulmonary capillaries markers of the hair. Or yellow tissues majoring here, they can be mentioned as systemic capillaries. Or further blood vessels, so we know key from the right side of the heart that is from the right ventricle, the blood vessel which is going towards the lungs that is the pulmonary artery. Pulmonary artery, warfare capillaries may be. Heart may blood Lake Harare here, that is the pulmonary veins, then the one which is taking the oxygenated blood to the tissues that is the aorta, and fair tissue deoxygenated blood collect cartage hard Keith out of blood vessels are in here. Those are the vena cava. 

The two when I cover there. So that's why I'm writing when a cave. Now this case may be, we can start from here, do inhaled air. Inhaled air now is inhaled hair made your partial pressure of oxygen here that is one 59 MM of mercury and partial pressure of carbon dioxide is .3. This is the partial pressure which is entering into the lungs. Now this case may alveolus oxygen diffuse Karzai here, just a key oxygen car partial pressure decline cartage 204 one 59 say come jogia 104 or the partial pressure carbon dioxide go ahead or buttock you blood may say carbon dioxide alveoli may move right here and that partial pressure increases to 40. The a and G partial pressures may change. Now you have your blood may say partial pressures each position per partial pressure of oxygen is. 40 and partial pressure of carbon dioxide is 45. Ye partial pressures. Now, is partial pressure given just say now we can see the difference partial pressure, oxygen, it is 40 and for in the alveolus, it is 104. So that means diffusion of diffusion hoga from a region of high partial pressure to a region of low partial pressure. So that means oxygen will be moving into the blood. 

Oxygen will be moving into the blood or you have a carbon dioxide, 45 hair or alveolus under 40 here. So Yahoo. So that means carbon dioxide will be moving. Into the alveoli. Your partial pressures here will partial pressures left side may are here. Now these partial pressures for partial pressure for oxygen is 95 and partial pressure for carbon dioxide is. What now this case may your tissue hair tissue oxygen used to partial pressure oxygen car lesser hoga and for carbon dioxide, it would be higher. So partial pressure for oxygen would be a little lesser than 40. And partial pressure for carbon dioxide would be slightly greater than 45. Again, this case may oxygen car partial pressure in terms of hair, tissue may come here. So oxygen will leave the blood vessel and enter into the tissues. While the carbon dioxide here, carbon dioxide, or blood may come here. So carbon dioxide will move from the tissue into the bloodstream. Again, the partial pressure has reached in this form. Now, this case may once you have exchange or fill your air hum exhale, exhale there, push me partial pressure of oxygen is 116 and partial pressure of carbon dioxide is 32. Is for me. 

Now, yedo partial pressures is per their you may get questions like agar alveolar air kaput. So partial pressure or tuca 104 partial pressure for CO2 is 40. Our inhaled air kaput though one 59 and .3. Exhale they are capucha head a 116 and 32. Then in dawn of blood vessels may be very well known. The age of blood, lung skeeter of ara hey, who cares about blood hair? That is deoxygenated blood. So Aga deoxygenated blood capuchin those may be O two is 40 and pCO2 is 45 or other oxygenated blood kabocha. Is 95 and pCO2 is 40. So is there a different levels per water different partial pressures are there that can be easily seen through this diagram? Now, what we have seen is that the exchange of gases occurs due to the difference in the partial pressure. Exchange of gases depends on. Partial pressures. And gases they are exchanged by simple diffusion. So gases are exchanged. By simple diffusion. And they move from. High partial pressure. High partial pressure to low partial pressure. High partial pressure to the low partial pressure. So is there a Sega gas system exchange Utah?