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Українські рефератиРусские рефератыКниги
НазваMedicinal Plants (реферат)
Автор
РозділІноземна мова, реферати англійською, німецькою
ФорматWord Doc
Тип документуРеферат
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Medicinal Plants

 

Plants grow in almost every part of the world. We see such plants as

flowers, grass and trees nearly every day. Plants also grow on

mountaintops, in the oceans, and in many desert and polar regions.

 

Without plants, there could be no life on the earth. People could not

live without air or food, and thus could not live without plants. The

oxygen is the air we breathe comes from plants. The food that we eat

comes from plants or from animals that eat plant. Much of our clothing

is made from the fibers of the cotton plant. But not only this. Many

useful drugs come from plants. Some of there plants have been used as

medicines for hundreds of years. More than 400 years ago, for example,

some Indian tribes of South America used the bark of the cinchona tree

to reduce fever. The dark is still used to make guinine, a drug used to

treat malaria and other diseases. Another drug, called digitalis, is

used in treating heart disease. It is made from the dried leaves of the

purple foxglove plant. The roots of the Mexican yamare used in producing

cortisone, a drug useful in treating arthritis and a number of other

diseases.

 

The collection and use of medicinal plants began many thousand years

ago.

 

болиголова", gentian [ ] - "тирлич" and many others.

 

Today many drug plants are cultivated and many drug plants are collected

from fields and woods.

 

Some drugs are made from fruits, leaves, flowers, roots, seeds of the

plants.

 

It is very important to collect plants in proper time. Leaves are

collected when they are fully developed. The time of the day is also

important in the collection of drug plants.

 

Flowers are collected before the time of pollination [ ].

Fruits are collected when they are fully grown but unripe.

 

To dry plants correctly is also very important. If it is made carelessly

the drug may be spoiled. Drug plants which have glicosides must be dried

at a low temperature.

 

And now I want to tell you some words about mint and camomile.

 

Mint

 

Mint is the name of a large family of plants. There are about 3500

species of mint. Most mint plants have small, white, bluish or pinkish

flowers. Their leaves are dotted with small glands that contain aromatic

oils. The oil are released when the leaves are crushed.

 

Popular cooking mints include marjoram, rosemary and sage. Such mints as

white horehound and peppermint add a cool, sharp flavor to candies.

Mints also are used in some medicines and perfumes.

 

Camomile

 

Camomile, is a group of small plants that are sometimes used in folk

medicine. The name is often spelled chamomile. The most commonly

cultivated camomile grows in the eastern and central regions of the

United States, where it was brought from Europe. It is called common or

corn, camomile, and sometimes the English, or Roman, camomile. The

flowers look much like daisies. The flowers and leaves smell sweet, but

taste bitter. They are sometimes applied as a poultice (warm, moist

mass) to treat toothache, or made into a tonic.

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