Popular Books on Natural Science

"man's body in a liquid state." For the blood i

ven in going further and calling the blood "man's body in a liquid state." From blood are prepared not only

lood, say as sugar is dissolved in water. By no means. Water is something quite different from the sugar di

bs in a remarkable manner the oxygen of the air which comes into the lungs by breathing. This blood, satur

st they are no longer visible to the naked eye. In this manner the blood penetrates all parts of the body, and returns to the heart by means of similar thread-like veins, which gradually j

emarkable in itself, is constantly going on: the exchange by which the useless and wasted matter are secreted and new substances distributed. This fact is wonderful, and its cause not yet full

ited in the bones, and form "phosphate of lime," the principal element in the bone. In the same manner fluor and calcium are given to the teeth. The muscles, or flesh, also receiv

heir waste particles, which it carries to that p

ge and transformation, in the continual exchange of fresh substances for waste ones. But this vital exchange is only kept up by the constant

Means of Existence," and the blood may