1) Which of these is not transported by the blood? a) Water b) Oxygen c) Waste d) Nutrients e) Carbon dioxide f) Digestive juices 2) Which of these is not part of the circulatory system? a) The heart b) The blood c) The blood vessels d) The lungs 3) Blood returning from the body to the lungs is.... a) Tired b) Blue c) De-oxygenated d) Oxygenated 4) When blood leaves the lungs it has become... a) Healthy b) Hotter c) Carbonated d) Oxygenated 5) What is the function of the heart? a) To beat in our chests. b) To pump blood around the body. c) To pump air into the lungs. d) To make blood 6) Why is the human circulatory system called a double circulatory system? a) Because humans have two hearts b) Because there are two types of blood vessels c) Because humans have two arms and two legs d) Because blood flows through the heart twice on one trip around the body 7) What is the specific function of the circulatory system? a) To keep us healthy b) To help our heart beat c) To transport vital substances around the body d) To keep us warm

The Circulatory System

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