THE BLOOD. 



493 



Albumen 



Cruor 



Fibrin 



The specific gravity of venous blood is a little lower than 

 arterial, and it contains about 5 parts in 1000 more water. 

 Venous blood is of a dark Modena red colour, whereas arte- 

 rial is of a brighter scarlet hue. 



ANIMAL HEAT. The chemical changes resulting from the 

 admixture of air and blood in addition to other physical and 

 chemical processes, constantly going on in the living body, 

 lead to the development of animal heat. The mean tempera- 

 ture of animals of different classes and species is shown in 

 the following table from Dr Dalton's Physiology: 



BIRDS 



MAMMALIA 



REPTILE 



FISH . 



Animal. 

 Swallow 

 Heron . 

 Raven . 

 Pigeon , 

 Fowl . 

 Gull . 

 Squirrel 

 Goat 

 Cat 

 Hare 

 Ox - . 

 Dog 

 Man 

 Ape 

 Toad 

 Carp 

 Tench 



Mean Temperature. 



108'5 

 107'6 

 106'7 



ioo-o 



105 



102'5 



101'3 



100'4 



99'5 



99'4 



98 -6 



95 -9 



51 -6 



51 -25 



52 -10 



