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Magnetism is a class of physical phenomena that includes forces exerted by magnets on other magnets. It has its origin in electric currents and the fundamental magnetic moments of elementary particles. These give rise to a magnetic field that acts on other currents and moments. All materials are influenced to some extent by a magnetic field. The strongest effect is on permanent magnets, which have persistent magnetic moments caused by ferromagnetism. Most materials do not have permanent moments. Some are attracted to a magnetic field....
Physics | Просмотров: 1125 | Author: About Mgnetism |Добавил: Warior | Дата: 06.02.2014| Комментарии (0)

"Lymphatic drainage" redirects here. For the massage technique, see Manual lymphatic drainage.
Lymphatic System
Human lymphatic system
Latin systema lymphoideum
The lymphatic system is part of the circulatory system, comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph (from Latin lympha "water goddess"[1]) unidirectionally towards the heart. The lymphatic system was first described in the seventeenth century independently by Olaus Rudbeck and Thomas Bartholin. The lymph system is not a closed system. The circulatory system processes an average of 20 liters of blood per day through capillary filtration which removes plasma while leaving the blood cells. Roughly 17 liters of the filtered plasma actually get reabsorbed directly into the blood vessels, while the remaining 3 liters are left behind in the interstitial fluid. The primary function of the lymph system is to provide an accessory route for these excess 3 liters per day to get returned to the blood.[2] Lymph is essentially recycled blood plasma.
Lymphatic organs play an important part in the immune system, having a considerable overlap with the lymphoid system. Lymphoid tissue is found in many organs, particularly the lymph nodes, and in the lymphoid follicles associated with the digestive system such as the tonsils. Lymphoid tissues contain lymphocytes, but they also contain other types of cells for support.[3] The system also includes all the structures dedicated to the circulation and production of lymphocytes (the primary cellular component of lymph), which includes the spleen, thymus, bone marrow, and the lymphoid tissue associated with the digestive system.
Biology | Просмотров: 1695 | Author: |Добавил: Warior | Дата: 25.12.2012| Комментарии (0)

Ring Lardner

I got another barber that comes over from Carterville and helps me out Saturdays, but the rest of the time I can get along all right alone. You can see for yourself that this ain't no New York: City and besides that, the most of the boys works all day and don't have no leisure to drop in here and get themselves prettied up.

You're a newcomer, ain't you? I thought I hadn't seen you round before. I hope you like it good enough to stay. As I say, we ain't no New York City or Chicago, but we have pretty good times. Not as good, though, since...

Tales | Просмотров: 2749 | Author: |Добавил: Warior | Дата: 18.12.2012| Комментарии (0)

Tissues
A tissue is a group of cells specialized for a common purpose.
Tissues are composed of cells and interstitial fluid involved in
material exchange with the environment. An animal has four main
tissues.
Animal tissues
Biology | Просмотров: 894 | Author: |Добавил: Warior | Дата: 14.12.2012| Комментарии (0)


Cells
Cells are the building blocks of all living things, either
unicellular or multicellular. All metabolic activities are
performed within cells. Metabolism, excretion,
reproduction, respiration, irritability and growth are the
basic functions that cells must perform.
Cells have vital roles in the survival of an organism
despite their differences in structure and function. All are
involved in different functions such as movement,
Biology | Просмотров: 742 | Author: |Добавил: Warior | Дата: 14.12.2012| Комментарии (0)

BODY ORGANIZATION OF ORGANISMS
Organisms develop from a zygote formed by the fertilization of an egg by a
sperm. A living organism can carry out all its biological functions, survive
independently, grow and develop during its life span and reproduce to form
offspring.
An organism includes six groups of components (in order of size): atoms,
molecules, cells, tissues, organs and systems. These components are closely
related to each other for the survival of the organism.
Anatomy deals with the structures that constitute the organism, while
physiology deals with the function of these structures.
Biology | Просмотров: 731 | Author: |Добавил: Warior | Дата: 14.12.2012| Комментарии (0)

Agriculture of USA

Almost 21mln. people or about 17 % of all population works in the agriculture of USA. Nearly 3 millions independent farms deliver feed products to the American consumers. The area of an average farm in the USA makes about 400 acres. In 1984 there were more than 2.3 million farms in the country. However, the very large farms -those with 1000 acres and more account for more than 40% of farm acreage. The largest manufacturers of grains making up 2,3% of total of farms, produce about 50 % of wheat in the country. Similarly, the largest 2 % of the manufacturers of chickens - broilers own 70 % of market sales....


Разное | Просмотров: 1839 | Author: |Добавил: Warior | Дата: 01.12.2012| Комментарии (0)


Adam Smith

After two centuries, Adam Smith remains a towering figure in the history of economic thought. Known primarily for a single work, An Inquiry into the nature an causes of the Wealth of Nations (1776), the first comprehensive system of political economy, Smith is more properly regarded as a social philosopher whose economic writings constitute only the capstone to an overarching view of political and social evolution. If his masterwork is viewed....


Разное | Просмотров: 1416 | Author: |Добавил: Warior | Дата: 01.12.2012| Комментарии (0)

About myself

My name is … . I’m a pupil of the 9th form of the secondary school #****. Our school gives general education. My class used to be a specialized humanitarian class. We have special programs in Russian, Russian Literature and History. I always liked social sciences and I enjoy staying here....


Разное | Просмотров: 830 | Author: |Добавил: Warior | Дата: 01.12.2012| Комментарии (0)

A Question of Taste. Fashion

Fashion is something we deal with everyday. Even people, who say they don’t care what they wear, choose clothes every morning that say a lot about them and how they feel that day.
What influences our choice of clothes is an interesting question. I believe that most of the people do not follow the fashion displayed on the catwalk. That kind of clothes is the product...

Разное | Просмотров: 1206 | Author: |Добавил: Warior | Дата: 01.12.2012| Комментарии (0)

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