130 
Electric conductivity of se- 
rum after drinking dilute 
sodium chloride solution, 
79 
after excessive water in- 
take, 78, 79 
Electrolytic dissociation, 107 
Embryo, development of, 110, 
111 
Embryology, 
103 
Emphysema, in mine work- 
ers, 19 
Endothelial cells, indirect 
regulation of CQO2 in 
blood by, 41, 42 
Energy, and food supply, 84 
intake and expenditure of, 
108 
“Entelechy,” 110, 111, 112 
Environment, adaptation to 
changes in, 93, 94, 95, 96 
and organism, 2, 98, 99, 
103 
external, 92, 93 
external, regulation of, 92, 
93 
internal, blood as the, 76 
in relation to function, 
82, 83, 84, 93 
influence on response to 
stimulus, 86 
maintenance by cell me- 
tabolism, 85, 86 
regulation of, 89, 90, 91 
relation of nervous system 
to, 92, 93 
experimental, 
INDEX 
Epithelial cells of lungs, gas- 
eous exchange by, 52, 53 
function of, 61 
secretion of oxygen by, 53, 
54, 56, 57 
selective secretion, 62 
Epithelium, adaptation to in- 
jury of, 96 
Erythrocytes (see red blood 
corpuscles) 
Excretion of urea, 39, 83 
of water, 77 
Exercise, effect on breathing, 
10 
Expiration, cause of, 22 
Faraday, 107 
Fertilisation, stimulus of, 111 
Filippi, 58 
Fitzgerald, 49, 52, 55 
Forced breathing and apnoea, 
9 
Fredericq, 6, 53 
Fredericq’s experiment, 6 
Gas pressure in arterial 
blood, 71, 72 
in venous blood, 71, 72 
Gases, in coal mines, 7 
solution in liquids, 27 
Gaseous exchange by flung 
epithelium, 52, 53 
Glaisher, 43, 59 
God, conception of, 117, 119 
Growth, secretion and, 66 
