Circulatory System 1
The main organ in the circulatory system is the heart.

Circulatory System 1

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The heart pumps blood through our circulatory system so that all the cells can receive food and oxygen, and have carbon dioxide and waste removed.

Have you already learned about the circulatory system? Then test your knowledge in this Science quiz on the topic.

1.
The veins from the body enter the heart with .......
deoxygenated blood
food
oxygen
oxygenated blood
2.
Which of the following is not a function of the veins?
To carry blood away from the heart
To carry blood into the heart
To carry carbon dioxide away from the cells
To carry waste away from the cells
3.
Which of the following statements about arteries is NOT true?
Substances can pass through their walls
They carry blood away from the heart
They have a thick wall containing muscle
They have no valves
No substances can pass through the artery wall
4.
Which of the following, about capillaries, is NOT true?
Substance exchange in cells and blood takes place here
They are too small to see without a microscope
They connect arteries to veins
They have thick walls
Their walls are only one cell thick
5.
The main organ in the circulatory system is the .......
brain
heart
liver
lungs
6.
Which of the following is not true about the ventricles of the heart?
They are the lower chambers of the heart
They are the upper chambers of the heart
They have more muscle than the atria
They pump blood
The left ventricle is more muscular as it pumps blood all round the body, the right pumps blood to the lungs
7.
Which of the following is not a function of the arteries?
To carry blood away from the heart
To carry blood into the heart
To supply food to the cells
To supply oxygen to the cells
8.
Which of the following is not part of the circulatory system?
Arteries
Capillaries
Lungs
Veins
9.
Which of the following is not a component of blood?
Plasma
Plates
Red blood cells
White blood cells
Should be platelets
10.
Which of the following, about veins, is NOT true?
Substances cannot pass through their walls
They carry blood to the heart
They have no valves
They have thin walls
They have valves to prevent the backflow of blood
Author:  Sue Davison

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