TIIE BLOOD. 109 



OTTO). The amount of urea in the blood from the hepatic vein is 

 greater than in other blood (GREHANT and QUINQUAUD). 



Blood of the Splenic Vein is decidedly richer in leucocytes 

 than the blood from the splenic artery. The red blood-corpuscles 

 of the blood from the splenic vein are smaller than the ordinary, 

 less flattened, and show a greater resistance to water. The blood 

 from the splenic vein is also claimed to be richer in water, fibrin, and 

 albumin than the ordinary venous blood (BECLARD). According to 

 v. MIDDENDORFF, it is richer in haemoglobin than arterial blood. It 

 coagulates more slowly. 



The Blood from the Veins of the Glands. The blood circulates 

 with greater rapidity through a gland during activity (secretion) 

 than when at rest, and the outflowing venous blood has therefore 

 during activity a lighter red color and a greater amount of oxygen. 

 Because of the secretion the venous blood also becomes somewhat 

 poorer in water and richer in solids. 



The blood from the Muscular Veins shows an opposite behavior, 

 for during activity it is darker and more venous in its properties 

 because of the increased absorption of oxygen by the muscles or 

 still greater production of carbon dioxide than when at rest. 



Menstrual Blood has, according to an old statement, not the 

 power of coagulating. This statement is nevertheless false, and the 

 apparent uncoagulability depends in part on the womb and the 

 vagina retaining the blood-clot, so that only fluid cruor is at times 

 eliminated, and in part on a contamination with vaginal mucus 

 which disturbs the coagulation. 



The Blood of the Two Sexes. Woman's blood coagulates 

 somewhat more quickly, has a lower specific gravity, a greater 

 amount of water, and a smaller quantity of solids than the blood 

 of man. The amount of blood-corpuscles and haemoglobin is 

 somewhat smaller in woman's blood. The amount of haemoglobin 

 is, according to OTTO, 146 p. m. for man's blood and 133 p. m. for 

 woman's. 



During pregnancy NASSE has observed a decrease in the specific 

 gravity, with an increase in the amount of water towards the end of 

 the eighth month. From then the specific gravity increases, and 

 at delivery it is normal again. The amount of fibrin is somewhat 

 increased (BECQUEREL and RODIER, NASSE). The number of 



