9. Tell about these changes.

10. What is necessary if you would have a healthy stomach?

11. What kind of food must you eat?

12. How much food must you eat?

13. How must you eat?

14. When must you eat?

15. What other rules must you obey?

[2] See Formula 7 on the Organs of Sense.

"EAT TO LIVE, NOT LIVE TO EAT."

There is pleasure in eating, because G.o.d has given us the sense of taste, that we may enjoy our food. But not everything which pleases this sense is good for the body, so we should learn what things are wholesome and choose them for our food and drink, refusing everything which is unwholesome.

Those who obey these rules "_eat to live_" and never become drunkards or gluttons.

QUESTIONS ON THE DIGESTIVE ORGANS AND DIGESTION.

What happens to the food after it is chewed?--"It is rolled by my tongue into the oesophagus or food-pipe."

Where is the oesophagus or food-pipe?--"It pa.s.ses from the mouth down the left side of the spine."

What is the stomach?--"A fleshy bag which receives and changes the food we eat."

Where is the stomach?--"In the front part of the chest, below the heart and lungs."

Of what is the stomach composed?--"Of three coats or membranes."

What do you mean by composed?--"Made of."

What do you mean by membrane?--"A thin skin."

What are the coats of the stomach called?--"The outer coat, the middle coat, the inner coat."

Describe the outer coat of the stomach.--"The outer coat is smooth, thick, and tough."

Of what use is the outer coat of the stomach?--"It strengthens and supports the stomach."

What do you mean by supports?--"Holds."

Describe the middle coat of the stomach.--"The middle coat is composed of fleshy fibres, which have the power of making themselves long or short."

What do you mean by fibrous?--"Composed of threads."

What do you mean by fibres?--"Threads."

Of what are the fibres of the stomach composed?--"Of flesh."

Of what use are the fibres of the stomach?--"They press upon the food, and push it toward the opening which leads out of the stomach."

Describe the inner coat of the stomach.--"The inner coat is soft, thick, spongy, and wrinkled."

Of what use is the inner coat of the stomach?--"It prepares a slimy substance and a fluid."

Of what use is the slimy substance?--"It prevents the stomach from being irritated by the food."

Of what use is the fluid?--"It dissolves the food."

What do you mean by slimy?--"Soft, moist, and sticky."

What do you mean by irritate?--"To produce unhealthy action."

What do you mean by dissolves?--"Melts."

Where is the food changed after it is taken into the mouth?--"First it is changed in the mouth; second, it is changed in the stomach; third, it is changed after leaving the stomach; fourth, it is changed in the lungs."

By what is it changed in the mouth?--"By the action of the teeth and the saliva."

By what is it changed in the stomach?--"By the action of the stomach and a kind of fluid called gastric juice."

By what is it changed after leaving the stomach?--"By the action of the bile and the pancreatic juice."

By what is it changed in the lungs?--"n.o.body knows."

Into what is it changed in the mouth?--"Into pulp."

Into what is it changed after leaving the stomach?--"Into chyle and waste substance."

Into what is it changed in the lungs?--"Into blood."

What is the change in the mouth called?--"Mastication, or chewing."

What is the change in the stomach called?--"Chymification, or chyme-making."

What is the change after leaving the stomach called?--"Chylification, or chyle-making."

What is necessary, if you would have a healthy stomach?--"I must be careful what kind of food I eat; how much I eat; and when I eat."

What kind of food must you eat?--"Wholesome food, etc." See Formula.