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Переведите предложения на английский язык, используя Vocabulary list.

1. Органы дыхания образованы гортанью, трахеей, легкими, плеврой.

2. Гортань - это орган голоса.

3. Легкие — основные органы дыхания.

4. Оба легких покрыты тонкой серозной мембраной, плеврой.

5. Каждое легкое конической формы.

6. Легкие делятся на доли, которые, в свою очередь, делятся на дольки.

7. В процессе дыхания воздух поступает через нос и проходит через горло,

гортань, трахею и достигает легких.

8. Передняя граница перекрывает перикард.

9. Трахея - это продолжение гортани.

10. Стенка бронхиальных трубок насыщена волокнами эластичной ткани.

Прочтите и переведите текст на русский язык. Найдите в тексте эквиваленты следующих словосочетаний и составьте с ними предложения по содержанию теста.

- самая важная жизненная функция;

- воздух проходит через;

- высоко эластичная;

- конической формы;

- верхушка простирается;

- основание довольно плоское;

- вес двух легких;

- каждое легкое заключено;

- воздух в плевральной полости;

- цвет легких;

- сразу же после рождения имеют место некоторые изменения;

- сердце находится в контакте с легкими;

- легочная артерия проходит;

- каждая основная бронхиальная трубка, входящая в легкие;

- по структуре, все трубки состоят из;

- трахея содержит на волокнистом слое большие кусочки хрящей;

- мельчайшие отделы бронхиальных трубок известны как альвеолы;

- другое множество бронхиальных кровеносных сосудов;

- важная система лимфатических сосудов.

LUNGS

The lungs form a pair of organs situated in the chest, and discharge the most important function of vital activity, viz., respiration. The air, which enters through the nose and passes down the throat, larynx, and windpipe, reaches the lungs by the right and left bronchial tubes, into which the windpipe divides within the chest, at the level of the second rib. The texture of the lungs is highly elastic, so that when the chest is opened each lung collapses to about one-third of its natural bulk.

Each lung is roughly conical in shape, with an apex projecting into the neck, and a base resting upon the diaphragm. The rounded outer surface of each lung is in contact with the ribs of its own side, while the heart, lying between the lungs, hollows out the inner surface of each to some extent. There is an anterior border, along which the outer and inner surfaces meet, and the borders of the two lungs touch one another for a short distance behind the middle of the breast-bone. The apex, which is blunt, extends 11/2 inches or more into the neck above the line of the collar-bone. The base is deeply hollowed. The right lung is split by two deep fissures into three lobes; the left has two lobes divided by a single fissure. The weight of the two lungs together is about 40 ounces, the right being rather heavier than the left. Each lung is enveloped in a membrane, the pleura or pleural membrane; in such a way that one layer of the membrane is closely adherent to the lung, from which indeed it cannot be separated, while the other layer lines the inner surface of one half of the chest. These two layers form a closed cavity, the pleural cavity, which everywhere surrounds the lung except at the point where the bronchi and vessels enter it. In some circumstances air escapes into the pleural cavity, and the lung then collapses temporarily upon its root, but air in the pleural cavity is very quickly absorbed and the lung speedily comes to occupy its original volume.

In children, the colour of the lungs is rose-pink, but, as life advances, they become more and more of a slaty hue, mottled with streaks and patches of dark-grey and black, which are due to deposits in the lymph spaces of dust inhaled on the breath.

Changes at Birth. Prior to birth, and in still-born children, the lungs are of a yellowish colour and packed away in the back of the chest. Their weight amounts to about 1/70 of the whole body-weight. Immediately upon birth some changes take place: the colour changes to rose-red, and the weight is suddenly doubled in consequence of the inrush of blood: the consistence becomes spongy, as air is drawn into the lungs, and if the child should die after drawing a few breaths, any portion of the lung which may be cut off floats in water. These changes are of importance, from the medicolegal point of view, in determining whether a dead infant has been born alive or not.

Connections with Heart. The heart lies in contact with the lungs and is connected by vessels with them. The pulmonary artery passes from the right ventricle and divides into two branches, one of which runs straight outwards to each lung, entering its substance along with the bronchial tube at the hilum or root of the lung. From this point also emerge the pulmonary veins, which carry the blood purified in the lungs back to the left auricle.

Minute Structure. Each main bronchial tube, entering the lung at the root divides into branches, which subdivide again and again till the finest tubes known as bronchioles or capillary bronchi. In structure, all these tubes consist of a mucous membrane surrounded by a fibrous sheat. The windpipe has in the fibrous layer large pieces of cartilage which in the windpipe and largest bronchial tubes form regular hoops, and in the medium-sized tubes are disposed as irregular plates. These pieces of cartilage have the function of preventing the tubes from closing or being compressed, and so obstructing the passage of air. The larger and medium bronchi are richly supplied with glands secreting mucus, which is poured out upon the surface of the membrane. This surface is composed of columnar epithelial cells, which are provided with cilia, credited generally with the power of moving expectoration upwards towards the throat, but is probably also designed to load the air passing into the lungs with warm moisture before it reaches these organs. The wall of the bronchial tubes is very rich in fibres of elastic tissue, and immediately beneath the mucous membrane is a layer of circularly placed unstriped muscle fibres, which is well developed in the smaller bronchi. To this muscular layer probably is due the removal of expectoration.

The smallest divisions of the bronchial tubes open out into a number of dilatations, the infundibula, each measuring about 1/20 inch in width, and these are covered with minute sacs, known as air-vesicles or alveoli. Each air-vesicle consists of a delicate membrane composed of flattened platelike cells, strengthened by a wide network of elastic fibres, to which the great elasticity of the lung is due; and in these thin-walled air-cells the important function of the lungs is carried on.

The branches of the pulmonary artery accompany the bronchial tubes to the farthest recesses of the lung, dividing like the latter into finer and finer branches, and ending in a dense network of capillaries, which lies everywhere between the air-vesicles, the capillaries being so closely placed that they occupy a much greater area than the spaces between them. The air in the air-vesicles is separated from the blood only by the delicate membranes, viz., the wall of the air-vesicle and the capillary wall, through which an exchange of gases readily takes place. The blood from the capillaries is collected by the pulmonary veins, which also accompany the bronchi to the root of the lung.

Another and much smaller set of bronchial blood-vessels runs actually upon the walls of the bronchial tubes, and these serve the purpose of nourishing the lung tissue.

There is in the lung also an important system of lymph vessels, which commence in spaces situated between the air-vesicles, under the pleural membrane, and in the walls along with the blood-vessel, and are connected with a chain of bronchial nodes lying near the end of the windpipe.

5. Ответьте на вопросы к тексту «Lungs».

1) What are the lungs?

2) How does the air reach the lungs?

3) How is each lung shaped?

4) Where is the apex of the lung located?

5) Where is the base of the lung located?

6) What is the weight of the lungs?

7) What is each lung enveloped by?

8) What colour are the infant’s lungs?

9) What changes can take place immediately after birth?

10) Why are these changes of importance?

11) What can you say about connection of lungs with the heart?

12) What does the minute structure of the lungs consist of?

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