.    Copy and complete the sentences using these words ( some may be used twice)


Oxygen,   body tissues.   ,   left lungs,     carbon dioxide,      veins.   Deoxygenated ,    right. Oxygen*



The right side of the mammalian heart pumps blood to the _____   .   Here it absorbs ______ and is now called ____   blood.

The gas _____   is removed from the blood in the lungs.   The blood returns to the _____   side of the heart and from here it is pumped to the ______ where it gives up its ____  and is now called _____ blood.    It passes back to the _____  side of the heart in ____    


                                                                                                                                                                [8marks]

2.   Explain what is meant by the term single Circulation and double circulation.                   [4marks]


3. Write at least 4 key points / statements about the mammalian heart.                                  [8marks]

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