WORMS 171 



Tapeworm. 



1. Eggs eaten by pigs or cattle. 



2. Egg develops in intestine. 



3. Young bore into muscles, and go into resting stage. 



4. Meat eaten by man (not thoroughly cooked). 



5. Development continues. Causes weakness and anaemia. 



6. Head attaches by hooks, absorbs food, grows by segments. 



7. Segments produce many eggs, which are scattered. 



Trichina (related to vinegar worms, and intestinal worms) : 



1. Young 'bore into muscles and form cysts (in animals). 



2. Uncooked flesh eaten and cyst dissolves (in man). 



3. Young again bore into muscles producing disease, cr death. 



Hookworm. 



1. Enters by way of feet, veins, lungs, throat, intestine. 



2. Punctures intestines, causing loss of blood and absorbs food. 



3. Lowers strength, makes susceptible to other diseases. 



4. Loss in labor of $20,000,000 per year in U. S. 



Explain: 



" Horse hair snakes." 



Vinegar " eels." 

 " Raining down " of earthworms. 



