Text A. Sechenov and His Works on the Blood Gases

I. M. Sechenov(1829-1905)wasaprominent Russian scientist, thefounder of Russian physiology and scientific psychology.

The range of Sechenov's scientific interests and the number of his research works are really great. 106 scientific works were written by him. In these works he included the findings which he had observed and determined before.

Some of his research works were connected with the investigation of the blood gases and their role in the respiratory process.

I. M. Sechenov isolated the blood gases and found out that most of the blood gases were combined with erythrocytes. No physiologist had been able to do it before Sechenov. On the basis of his observations I. M. Sechenov came to the conclusion that hemoglobin was that substance of the blood which accomplished the exchange of oxygen and carbon dioxide in the respiratory process. Physiologists of many countries who had worked on this problem before Sechenov could not estimate the role of hemoglobin in the act of respiration. So the accomplishment of the respiratory process is due to hemoglobin.

l_f M. Sechenov investigated the process of absorption of carbon dioxide by the solutions of salts. When he had completed his investigations, he proved that only 2/3 of carbon dioxide were dissolved (растворяются) in plasma. The rest of carbon dioxide was combined with red blood cells. The transfer of carbon dioxide from the blood into the lungs was due to the law (закон) of diffusion of gas from fluid into the air. When Sechenov had investigated this phenomenon, he was able to answer the question why oxygen passed into the blood from atmospheric gases during the act of respiration.

CLASS ASSIGNMENTS

XII. Translate the following sentences. Explain the choice of tense forms while translating the predicates of the Object Clauses:

1. The doctor stated that the patient had pneumonia. 2. The surgeon considered that the patient would feel well in two or three days. 3. The professor found out that the patient had had tuberculosis two years before. 4. They came to the conclusion that the atmospheric pressure was an important factor for patients with cardiac diseases. 5. The researchers said that they had observed new phenomena.

XIII. Translate the following sentences according to the model:

No conclusions were drawn from this experiment.

Никаких выводов не было сделано из этого опыта.