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Поставьте глагол в прилагательном в нужном времени

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Deer22
Deer22
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Fill in the blanks with the corresponding words given below: valves, heart, ventricle, chambers, capillaries, septum, mitral valve, atrium, organ.

1. The centre of the circulatory system us the heart.

2. The heart is a hollow muscular organ which has four chambers.

3. The heart is divided into separate right and left parts by the septum.

4. Each of these parts has the ventricle and the atrium.

5. The valves are located at the entrance and exit of each ventricle.

6. We call the valve that separates the chambers the atrium and the ventricle the mitral valve.

7. The walls of the arteries and veins are thicker than those of the capillaries.

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