Chapter 8- The Circulatory System

Question 1

Normal human body temperature?

Answer 1

37 degrees

Question 2

How much blood does an average adult have?

Answer 2

5 litres of blood circulating in their blood vessels

Question 3

What is blood made up of?

Answer 3

• Plasma
• Red blood cells
• White blood cells
• Platelets

Question 4

Where are blood cells made?

Answer 4

The bone marrow

Question 5

What is the function of plasma?

Answer 5

To transport substances and heat

Question 6

What is the function of red blood cells?

Answer 6

To transport oxygen

Question 7

What is the function of white blood cells?

Answer 7

To fight disease

Question 8

What are platelets?

Answer 8

Tiny fragments of larger cells

Question 9

What is the function of platelets?

Answer 9

To clot blood

Question 10

Three main types of blood vessels?

Answer 10

• Arteries
• Capillaries
• Veins

Question 11

Function of arteries?

Answer 11

To carry blood away from the heart

Question 12

What is the function of veins?

Answer 12

To carry blood to the heart

Question 13

What are capillaries?

Answer 13

Tiny blood vessels that links the arteries and veins

Question 14

The functions of blood

Answer 14

• Transport
• Defence against disease
• Constant body temperature

Question 15

Function of the heart?

Answer 15

To pump blood around the body.

Question 16

How many chambers does the heart have and describe them.

Answer 16

4 chambers. Two atria and two ventricles

Question 17

Function of valves?

Answer 17

Stops the backflow of blood