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Science Quiz - Circulatory System 02 (Questions)

The circulatory system keeps your body alive and active. In KS3 Science, students learn how the heart and blood vessels deliver oxygen and remove waste.

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Fascinating Fact:

Your heart beats about 100,000 times every day.

In KS3 Science, pupils explore the circulatory system, learning how the heart pumps blood, how vessels transport nutrients, and why circulation is vital for health and survival.

Key Terms

Capillaries: Tiny blood vessels where oxygen and nutrients pass into cells and waste is collected.
Pulse: The rhythmic beat felt in arteries as blood is pumped by the heart.
Haemoglobin: A protein in red blood cells that carries oxygen around the body.

Frequently Asked Questions (Click to see answers)

How many times does the heart beat in a day?

The human heart beats around 100,000 times each day, pumping blood continuously to supply oxygen and nutrients to the body.

What is the role of capillaries in the circulatory system?

Capillaries connect arteries and veins. They allow oxygen and nutrients to pass from blood into cells and remove carbon dioxide and waste products.

Why is the circulatory system important?

The circulatory system is important because it delivers oxygen and nutrients, removes waste, and keeps the body’s cells functioning properly.

Try These Related Quizzes

1.

Which is the correct statement about plasma?

[ ]	A straw coloured liquid portion of blood
[ ]	It contains haemoglobin
[ ]	It fights against disease
[ ]	It helps the blood to clot

2.

Which is the correct statement about red blood cells?

[ ]	They can be produced by a type of blood cell
[ ]	They fight against disease
[ ]	They have no nucleus
[ ]	They help the blood to clot

3.

Which is the correct statement about white blood cells?

[ ]	They can be produced by a type of blood cell
[ ]	They contain haemoglobin
[ ]	They help the blood to clot
[ ]	They protect the body against disease

4.

Which is the correct statement about platelets?

[ ]	They are produced by the kidneys
[ ]	They contain haemoglobin
[ ]	They fight against disease
[ ]	They help the blood to clot

5.

Which is the correct statement about capillaries?

[ ]	They are very narrow blood vessels
[ ]	They contain haemoglobin
[ ]	They contain valves
[ ]	They have thick muscle

6.

Which is the correct statement about antibodies?

[ ]	They are produced by some capillaries
[ ]	They are produced by some plasma
[ ]	They are produced by some red blood cells
[ ]	They are produced by some white blood cells

7.

One of the functions of white blood cells is .......

[ ]	to carry carbon dioxide
[ ]	to carry oxygen
[ ]	to engulf microbes
[ ]	to help the blood to clot

8.

One of the functions of plasma is .......

[ ]	to carry carbon dioxide from the organs to the lungs
[ ]	to carry oxygen from the lungs to the organs
[ ]	to form blood clots
[ ]	to protect the body

9.

The function of red blood cells is .......

[ ]	to carry carbon dioxide from the organs to the lungs
[ ]	to carry oxygen from the lungs to the organs
[ ]	to form blood clots
[ ]	to protect the body

10.

Which of the following is NOT a function of blood?

[ ]	It forms part of the body's defence mechanism
[ ]	It transports food to cells
[ ]	It transports oxygen to cells
[ ]	It transports waste to cells

You can find more about this topic by visiting BBC Bitesize - The circulatory system

Science Quiz - Circulatory System 02 (Answers)

1.

Which is the correct statement about plasma?

[x]	A straw coloured liquid portion of blood
[ ]	It contains haemoglobin
[ ]	It fights against disease
[ ]	It helps the blood to clot

It is the liquid part of blood

2.

Which is the correct statement about red blood cells?

[ ]	They can be produced by a type of blood cell
[ ]	They fight against disease
[x]	They have no nucleus
[ ]	They help the blood to clot

They have no nucleus so that they can contain lots of haemoglobin

3.

Which is the correct statement about white blood cells?

[ ]	They can be produced by a type of blood cell
[ ]	They contain haemoglobin
[ ]	They help the blood to clot
[x]	They protect the body against disease

Some white blood cells digest microbes

4.

Which is the correct statement about platelets?

[ ]	They are produced by the kidneys
[ ]	They contain haemoglobin
[ ]	They fight against disease
[x]	They help the blood to clot

They stick together, along with a protein called fibrinogen to form a clot which plugs the hole in the blood vessel

5.

Which is the correct statement about capillaries?

[x]	They are very narrow blood vessels
[ ]	They contain haemoglobin
[ ]	They contain valves
[ ]	They have thick muscle

Their wall is only one cell thick

6.

Which is the correct statement about antibodies?

[ ]	They are produced by some capillaries
[ ]	They are produced by some plasma
[ ]	They are produced by some red blood cells
[x]	They are produced by some white blood cells

They are part of our immune system

7.

One of the functions of white blood cells is .......

[ ]	to carry carbon dioxide
[ ]	to carry oxygen
[x]	to engulf microbes
[ ]	to help the blood to clot

They also produce antibodies and neutralise toxins

8.

One of the functions of plasma is .......

[x]	to carry carbon dioxide from the organs to the lungs
[ ]	to carry oxygen from the lungs to the organs
[ ]	to form blood clots
[ ]	to protect the body

Plasma also transports glucose and hormones

9.

The function of red blood cells is .......

[ ]	to carry carbon dioxide from the organs to the lungs
[x]	to carry oxygen from the lungs to the organs
[ ]	to form blood clots
[ ]	to protect the body

Haemoglobin is the protein inside a red blood cell

10.

Which of the following is NOT a function of blood?

[ ]	It forms part of the body's defence mechanism
[ ]	It transports food to cells
[ ]	It transports oxygen to cells
[x]	It transports waste to cells

It transports waste AWAY from cells