HOW OUR BLOOD IS MADE. 289 



do not all have the same pathological effect. One kind of venom 

 will have a specially poisonous effect upon certain groups of 

 nerve cells and nerve centres, while another kind of venom will 

 exert little or no poisonous, paralysing influence upon those 

 nerve centres, but will act with powerful effect upon some other 

 groups. For instance, Cobra venom poisons the nerve centres 

 which control the automatic movements of the lungs and 

 diaphragm. Puff Adder venom does not have this effect. This 

 venom and that of the Boomslang act powerfully on the nerve 

 endings, blood-vessel walls, and blood, causing more or less 

 extensive haemorrhage into the tissues. 



A strong man is far more difficult to overthrow than a weak 

 one. So, too, is the nervous system and brain. If you have 

 strong, healthy nerve and brain cells, snake venom or disease 

 microbes will be far less likely to kill than if the brain and nerve 

 cells are weak, sickly, or inflamed. 



The chief cause of this unhealthy condition of the cells of the 

 brain and nerves, is the habitual indulgence in alcoholic liquor. 

 It has been established as a fact in science, after exhaustive 

 experimentation and observation, that alcohol poisons, weakens, 

 distorts, inflames, and kills these cells. Dead nerve cells are 

 never replaced. 



How OUR Blood is Made — A Marvellous Process. 



It is blood which builds up the tissues of all living creatures 

 upon our world, ourselves included. It is the blood which supplies 

 every particle of nourishment required for our bones, muscles, 

 brain, nerves, nails, and hair. 



Where does the blood come from, and how is it made ? Yes, 

 we all know it is made from the food we eat, and the water we 

 drink — but how ? Has it never struck you that the process 

 must be a marvellous one which converts beef, potatoes, 

 bread, and all our foods, into blood ? It is the digestive 

 apparatus which performs this wonderful feat. The lowest 

 forms of animal life upon our world are tiny creatures which 

 live in the ocean. They are simply living stomachs. We human 

 folk, too, are stomachs — with appendages. 



Well, now let us carefully trace the journey taken by our 

 dinner, and see what becomes of it. 



u 



