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Read the text and fill in the following words:

Atrium, blood, capillaries, circuit (2), fluid, heart, lungs, pump, side, systemic, tissues, ventricle, vessels.

The human cardiovascular system consists of the heart, the blood vessels, and blood.

The --heart--- is a muscular organ lying slightly to the left of the middle of the chest between two ---lungs---.

The heart acts as a ---pump--, which pumps blood round two independent circuits: the pulmonary---circuit--- and the systemic ---circuit---. The right side of the heart, consisting of the right atrium and the right ventricle sends ----blood--- into the lungs. The left side consisting of the left ---atrium--- and left ---ventricle--- and sending blood throughout the whole body, pumps with more force than the right ventricle.

The ---systemic--- circuit is much larger , so the left ---side---- of the heart is stronger and thicker than the right.

There are three kinds of blood ---vessels: arteries, veins, and capillaries. Arteries are vessels carrying blood away from the heart. Veins are vessels carrying blood from the --tissues-- to the heart. The blood vessels are supplied with nerves . --Capillaries--- are tiny vessels which connect the smallest arteries and veins. In the capillaries the blood is moving along at the rate half a millimetre per second.

Blood is the --fluid--- circulating through the heart , arteries, capillaries,and veins. The order of blood flow is: HEART- ARTERIES –CAPILLARIES – VEINS – HEART.

1.Where were you, I was, I rang, nobody answered, I was, I was reading, did not hear.

2. What were you doing, I was working, I was, I did not see.

3.Nina celebrated, there were, I came, somebody was playing, two or three pairs were dancing.

4.Somebody is playing.

5.I like.

6.I looked, it was raining, people were hurrying.

7.What were you doing, I was having.

8.I came, I saw, were sitting, father was reading, who lives.

9.I was working.

10.It was raining.

11.Where is your sister, she is, she is doing.

12.He is brushing, he cleans.

13.She is sleeping.

14.You are talking, you never talk.

15.My mother is sitting, I am setting.