HAT WE HAVE LEARNED

1. The stomach and intestine stir and rub the food, and mix it
with juices.

2. The juices change albumin to a liquid, and starch to sugar.
They also change fat to the form of tiny drops.

3. The digested food soaks through the sides of the intestine
into the blood tubes.

4. The blood carries the food to the liver.

5. The liver changes food to blood.

6. Blood goes to all parts of the body and feeds the cells.

7. The liver keeps poisons from getting into the blood.

8. Water and minerals become a part of the blood without being
digested.

9. When food is not well digested, the liver cannot make it into
good blood. This makes us bilious.

10. If food is not soon digested it sours and decays. This makes
us sick.

11. We can make food digest quickly by chewing it well and eating
slowly.

CHAPTER V

FOODS

=28. Kinds of food.=--The cells of the body need water, albumin, fat,
sugar, and minerals for food. We sometimes eat sugar alone, and we
drink pure water. But most of our food is a mixture of all five kinds
of food. Food comes from animals and plants.

=29. Milk=.--Milk is the best food known. It contains just enough
water, albumin, fat, sugar, and minerals. Babies and young mammals
live on milk alone. A man can live upon four quarts of milk a day. In
sickness, milk is the very best food for men, as well as for babies.

The albumin of milk becomes hard when the milk sours. This makes
_cheese_. The fat of milk rises to the top. We call it _cream_. When
cream is churned, the pure fat comes together in a lump. Pure fat of
milk is called _butter_. Cheese and butter are both good foods.

=30. Eggs.=--Eggs are also good food. The white of an egg is almost pure
albumin. The yolk is albumin and fat. Eggs have no starch or sugar.
They are not a perfect food, for some sugar must be eaten. But they can
be quickly digested and they produce a great deal of strength.

=31. Meat.=--Meat contains albumin and fat, but no sugar. Fish,
oysters, and clams are like meat. They all make good food. Boys and
girls should eat milk, eggs, and meat. These foods are the best to
give strength to the body. Nearly all food from animals is more
quickly digested and gives more strength than food from plants.

=32. Bread.=--White bread is a food made from wheat. The wheat is
gr