Circulatory System (T9 IGCSE)

How many chambers does the heart have?

• 1

• 2

• 3

• 4

Most arteries in the body contain oxygen-rich blood (think about it!)

• True

• False

What is the main organ of the circulatory system?

• Lungs

• Heart

• Liver

• Brain

What is the function of the aorta?

• Bring deoxygenated blood from the body

• Take deoxygenated blood to the lungs

• Bring oxygenated blood from the lungs

• Take oxygenated blood around the body

Which of these is not a difference between veins and arteries?

• Lumen diameter

• Wall thickness

• Elasticity

• Permeability

Blood moving from the right atrium to the right ventricle passes through the...

• Tricuspid valve

• Bicuspid valve

• Semi-lunar valve

Why is it important that capillaries are permeable?

• To withstand high pressure

• To prevent blood flowing backwards

• To allow exchange of materials with the tissues

• Because their walls are only one cell thick

Which blood vessels do not have valves?

• Veins and capillaries

• Veins and arteries

• Arteries and capillaries

• Shunt vessels and veins

When blood enters the heart, it first enters the...

• Atria

• Ventricles

• Veins

• Arteries

Where does the blood that exits the heart travel to?

• Left - lungs, right - body

• Right - body, left - lungs

• Right - lungs, left - body