CLASS ASSIGNMENTS

XII. Translate the following indefinite personal sentences:

1. It is known that blood becomes oxygenated in the lungs. 2. They say that patient Smirnov's health will be restored soon. 3. One knows that pulse rate becomes rapid on physical exertion. 4. It is estimated that his body weight considerably decreased during the prolonged illness.

XIII.Answer the following questions:

1. How many days does each erythrocyte live? 2. How many days does each leucocyte live? 3. How many erythrocytes are born and die every day?

XIV. Read and translate the following sentences:

1. When a muscle fiber contracts so that its length does not change, one of the discs becomes shorter and the other, longer. 2. The pressure in the cranial cavity is sometimes increased as a result of the increase in arterial pressure. 3. In the man the corpuscles may compose from 39 to 50 per cent of the blood volume. 4. Can life exist without oxygen? 5. A cardiac cycle is composed of the wave of contraction and a period of rest. 6. In the human body sex differences exist in the inner organs and their functions.

XV. Read the passages and answer the questions:

1. This substance is composed of plasma, red corpuscles, white corpuscles and platelets. What substance is it?

2. These cellular elements are the most numerous in the blood. They range from 4 to 5 million per cu mm in healthy adults. Their colour(ing) is red. What cellular elements are they?

3. This blood is brought to the heart from systemic and portal circulations. It enters the right atrium of the heart. Then this blood passes into the right ventricle. From the right ventricle this blood passes into the pulmonary artery. What blood is it?

XVI. Revise Text В (Lesson 13) and say what heart valve is described in each sentence:

1. This valve connects the atrium and the ventricle of the left heart chamber. 2. This valve connects the atrium and the ventricle of the right heart chamber.

3. This valve is located at the point of origin of the aorta in the left ventricle. 4. This valve is located at the point of origin of the pulmonary artery in the right ventricle.

XVII. Combine the nouns with appropriate verbs, putting them in the necessary form:

the heart, the blood, the artery

contract, pass, dilate, bring, pump, vary, beat, compose, work, consist of, discharge out, receive, enter, act, serve, send, oxygenate, carry

XVIII. Read Texf D and say what data important for a future doctor are given in it. What will you try to remember?

<== попередня сторінка	\|	наступна сторінка ==>
Text A. Work of the Human Heart	\|	Text С. The Physiology of the Lungs

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