Carbon dioxide total venous

In every 100 milliliters of arterial blood, there is a total of 48 milliliters of free and comhined CO . In venous blood of resting humans, there is about 5 milliliters more than this. Only about 1/20 of the carbon dioxide is uncombined, a fact which indicates that there is a specialized mechanism, aside from simple solulion, for the transport of CO in the blood. 

With large doses, thiopental causes dose-dependent decreases in arterial blood pressure, stroke volume, and cardiac output. This is due primarily to its myocardial depressant effect and increased venous capacitance there is little change in total peripheral resistance. Thiopental is also a potent respiratory depressant, lowering the sensitivity of the medullary respiratory center to carbon dioxide. 

As every medical student learns, it can be shown, from estimates of the total amount of carbon dioxide dissolved in the blood and from estimates of the difference in the amount of dissolved carbon dioxide in arterial and venous blood, that most of the 200 milliliters of carbon dioxide produced per minute in an average adult human cannot be transported in simple physical solution to the lungs. (1998, p. 132)... 

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