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The Human Circulatory System
Your heart rate can be measured by checking your pulse rate.

The Human Circulatory System

This KS2 Science quiz explores the different parts of the human circulatory system and how they work together.

The circulatory system is a transportation network for blood, carrying essential stuff to every part of your body. Imagine it as a delivery service for oxygen and food to keep your cells happy and working. Your heart is the hardworking pump that keeps the blood moving through your arteries. After delivering goodies, the blood returns to the heart through the veins. Lungs also play a part by refreshing the blood with oxygen and removing waste.

Take this science quiz to test what you know about the heart, arteries, veins, and more in the human circulatory system.

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1.
Which are the thinnest and smallest blood vessels?
Arteries
Veins
Capillaries
None of the above
The walls of capillaries are only one cell thick!
2.
What is the easiest way to measure your heart rate?
By seeing how many sit-ups you can do in 30 seconds
By counting your breaths
By listening to your heartbeats
By checking your pulse rate
Your pulse rate rises after you've been active for a short time
3.
The heart pumps blood to the lungs. What waste product is removed from the blood by the lungs?
Oxygen
Acid
Carbon dioxide
Urea
Carbon dioxide is sometimes written as CO2
4.
Which blood vessels carry oxygenated blood?
Arteries
Veins
Capillaries
All of the above
Veins carry deoxygenated blood back to the heart
5.
Which one of the following is not part of the heart?
Right ventilator
Septum
Right atrium
Left ventricle
Your heart is divided by the septum into two sides - each side is divided into an atrium and ventricle
6.
The human circulatory system includes the heart, lungs and blood vessels. What is another name for the circulatory system ?
The endocrine system
The cardiovascular system
The nervous system
The digestive system
'Cardio' means 'heart' and 'vascular' refers to the blood vessels
7.
Blood delivers oxygen and what else to the cells in your body?
Carbon dioxide
Energy
Essential nutrients
Kind thoughts
Blood then takes on the waste materials from the cells, including carbon dioxide - it is a highly-efficient delivery system!
8.
What enters the blood from the lungs?
Oxygen
Acid
Carbon dioxide
Urea
Carbon dioxide leaves the body and oxygen enters
9.
Where does the heart pump oxygenated blood to?
To the brain only
To the lungs only
To the digestive system only
To the whole body
All the living cells in our bodies need oxygen in order to work
10.
Waste products must be removed before the blood returns to the heart. Which organs remove waste from the blood?
The brain and spleen
The liver and kidneys
The skin and gall bladder
The liver and spleen
The waste is passed out of the body when you go to the toilet
You can find more about this topic by visiting BBC Bitesize - The circulatory system

Author:  Sheri Smith

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