334 RESPIRATION 



Compute the rate per kilo per hour for the dog. Compare with the 

 rate per kilo on man and explain the difference observed. 



13. Gases of Arterial and Venous Blood. Tissue respiration is inti- 

 mately dependent on the capacity of the blood to carry oxygen and carbon 

 dioxide by chemical fixation, chiefly by the respiratory pigment hemo- 

 globin. Measure the gaseous content of arterial and venous blood 

 simultaneously drawn from a dog under local analgesia. Draw the 

 samples under petrolatum and analyze promptly for the three gases, 

 carbon doxide, oxygen and nitrogen, in a Van Slyke apparatus, page 303. 

 Also consult the Journal of Biological Chemistry, vol. 30, page 347, and 

 vol. 33, page 127. 



