IGCSE Circulatory system overview

A circulatory system contains blood vessels, a pump and valves to ensure...

• a one-way flow of blood.

• blood reaches every cell in the body.

• nutrients reach every cell in the body.

• the gaseous exchange of oxygen and carbon dioxide.

TRUE or FALSE?

A single circulatory system is more efficient than a double circulatory system.

Which statement about a double circulatory system is incorrect?

• Found in mammals.

• Blood passes through the heart twice in one cycle.

• Blood pressure is maintained.

• A simple system.

TRUE or FALSE?

Arteries always carry oxygenated blood.

Where is blood oxygenated in the circulatory system of a fish?

• The lungs.

• The heart.

• The gills.

• The arteries.

In a mammal, oxygenated blood is carried to the left atrium via the...

• pulmonary artery.

• aorta.

• pulmonary veins.

• vena cavae.

Which is the correct order of blood flow in the left side of the heart?

• vena cava - atrium - ventricle - pulmonary artery.

• pulmonary veins - atrium - ventricle - pulmonary artery.

• pulmonary veins - atrium - ventricle - aorta.

• vena cava - atrium - ventricle - aorta.

TRUE or FALSE?

Systolic blood pressure measures the pressure in the arteries when the heart rests between beats.

TRUE or FALSE?

The coronary artery supplies blood to the heart tissue.

Which factor that contributes to coronary artery disease is out of our control?

• Diet.

• Genetics.

• Exercise.

• Stress levels.