Document zz3wYzv1YoZbgM7q0qD9Oeg6m

1 a red blood cell right here and now it has been cut. Page 752 2 You see, if you cut this across now and you look into 3 the space, that is why you see this space right here. 4 Now, for the first time, you can actually 5 see how thin the barrier is between the air space and 6 the blood space. Do you see that? 7 Q Now, that barrier, is that where the 8 exchange is taking place? 9 A Thatis exchange of oxygen and carbon 10 dioxide right here. Do you see how thin that is? 11 Now, if you have asbestos fibers in the 12 space like this one, the actual connective tissue will 13 grow out into the space and make this thick and some 14 of the doctors may talk about changes in diffusing of 15 gases or increase in gas diffusion and that means that 16 this area has been thickened by scar tissue. 17 I don't know if that is an issue here, but 18 that is where that takes place. 19 Q Yes, sir. 20 A Okay. What I want to deal with now is what 21 we call -- first of all, maybe you have been wondering